rach 90 - Page 10 - Developer IT

how to load data and store the data from a file using numpy

- by Charlie Epps

I have the following file like this: 2 qid:1 1:0.32 2:0.50 3:0.78 4:0.02 10:0.90 5 qid:2 2:0.22 5:0.34 6:0.87 10:0.56 12:0.32 19:0.24 20:0.55 ... he structure is follwoing like that: output={} rel=2 qid=1 features={} # the feature list "1:0.32 2:0.50 3:0.78 4:0.02 10:0.90" output.append([rel,qid,features]) ... How can I write my python code to load the data, thanks

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How to edit the first line in a text file in c++?

- by tsubasa

I have a text file looks like this : 100 50 20 90 4.07498 0.074984 37.1704 28.1704 20.3999 14.3999 48.627 35.627 .... I need to edit this file so that everything is kept the same except the first line, 3rd item. The ouput should look like this: 100 50 19 90 4.07498 0.074984 37.1704 28.1704 20.3999 14.3999 48.627 35.627 .... How can I do it in c++ ? Can anybody help me? Thanks, Hoang

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How can I delete duplicated users in django?

- by Catalina

Hi guys, I need to delete duplicate users in django (by duplicate I mean two or more users with the same email). If your instance there are three records like this: id email 3 [email protected] 56 [email protected] 90 [email protected] I need to delete records 56 and 90 and leave the oldest record id - 3 Is there a way to quickly do this. Thanks :)

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removing subset transactions form file

- by user324887

I have a file containing data as follows 10 20 30 40 70 20 30 70 30 40 10 20 29 70 80 90 20 30 40 40 45 65 10 20 80 45 65 20 I want to remove all subset transaction from this file. output file should be like follows 10 20 30 40 70 29 70 80 90 20 30 40 40 45 65 10 20 80 Where records like 20 30 70 30 40 10 20 45 65 20 are removed because of they are subset of other records.

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Is two-finger non-homerow touch-typing for programming acceptable?

- by codebliss

I'm currently typing about 90 wpm (from http://speedtest.10-fast-fingers.com/ 90 correct 0 missed) using two fingers and the occasional ring or index. This probably grew from learning to type at an early age, before home-row was presented to me. Is this acceptable? Do people religiously endorse home-row even with low-mistake poking without looking at the keyboard?

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Switch case in where clause (sql server)

- by user685565

I want to use case in sql statement where clause but I have a problem as I want to create a where clause condition on the basis of some value and I want to set a not in clause values on the basis of it here is the query where am facing an issue WHERE CODE = 'x' and ID not in ( case when 'app'='A' then '570','592' when 'Q' then ID 592,90 else 592,90 END but its not syntax

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Concate String In MYSQL

- by streetparade

How can i concate this string in mysql desc=desc+$desct what i want is each time i insert a variable from PHP that the string is added to the string which was already in db and seperated with || the field desc should look like this desc 10||30||90||710 say i want to add the value 20 desc 10||30||90||710||20 then the desc field should look like this How can i implement this?

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Selecting rows distinctively

- by noway

Lets assume my database table structure is something like | items | weight | |============|==========| | item_1 | 50 | | item_2 | 90 | | item_2 | 45 | | item_2 | 60 | | item_3 | 40 | In the select statement, I want to show an item only for once with the highest weight also ordered by height. So the result should be : | items | weight | |============|==========| | item_2 | 90 | | item_1 | 50 | | item_3 | 40 | I tried something like SELECT DISTINCT items, weight FROM mytable ORDER BY weight DESC but it didn't work because the results are actually distinct. How can I make that selection?

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In R, How to add Row for Information:

- by Moe

Hi, I'm trying to add a Row to my data.frame to spit out the average of the column. This is my data frame: Weight Response 1 Control 59 0.0 2 Treatment 90 0.8 3 Treatment 47 0.1 4 Treamment 106 0.1 5 Control 85 0.7 6 Treatment 73 0.6 7 Control 61 0.2 I'd like it to become: Weight Response 1 Control 59 0.0 2 Treatment 90 0.8 3 Treatment 47 0.1 4 Treamment 106 0.1 5 Control 85 0.7 6 Treatment 73 0.6 7 Control 61 0.2 8 AVERAGES 74 0.3 Thanks!

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Find closest number in range?

- by Chris

What is the best way to find the closes value in a range... for example i have an array with 0, 90, 180, 270, 360.. And a number 46... What is the best way to find 90 in the array? (in actipnscript 3)

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Merging some columns of two mysql tables where id = fileid

- by garg

There are two tables TableA filedata_id | user_id | filename 1 | 1 | file.txt 2 | 1 | file2.txt TableB a_id | date | filedataid | counter | state | cat_id | subcat_id | med_id 99 | 1242144 | 1 | 2 | v | 55 | 56 | 90 100 | 1231232 | 2 | 3 | i | 44 | 55 | 110 I want to move columns cat_id, subcat_id, med_id to TableA where tableA.filedata_id = TableB.filedataid The result should be: TableA filedata_id | user_id | filename | cat_id | subcat_id | med_id 1 | 1 | file.txt | 55 | 56 | 90 2 | 1 | file2.txt | 44 | 55 | 110 and so on. Is there a way to do this easily?

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Mpd as pppoe server with authorisation by freeradius2

- by Korjavin Ivan

I install freeradius2, add to raddb/users: test Cleartext-Password := "test1" Service-Type = Framed-User, Framed-Protocol = PPP, Framed-IP-Address = 10.36.0.2, Framed-IP-Netmask = 255.255.255.0, start radiusd, and check auth: radtest test test1 127.0.0.1 1002 testing123 Sending Access-Request of id 199 to 127.0.0.1 port 1812 User-Name = "test" User-Password = "test1" NAS-IP-Address = 127.0.0.1 NAS-Port = 1002 Message-Authenticator = 0x00000000000000000000000000000000 rad_recv: Access-Accept packet from host 127.0.0.1 port 1812, id=199, length=44 Service-Type = Framed-User Framed-Protocol = PPP Framed-IP-Address = 10.36.0.2 Framed-IP-Netmask = 255.255.255.0 Works fine. Next step. Add to mpd.conf: radius: set auth disable internal set auth max-logins 1 CI set auth enable radius-auth set radius timeout 90 set radius retries 2 set radius server 127.0.0.1 testing123 1812 1813 set radius me 127.0.0.1 create link template L pppoe set link action bundle B set link max-children 1000 set link no multilink set link no shortseq set link no pap chap-md5 chap-msv1 chap-msv2 set link enable chap set pppoe acname Internet load radius create link template em1 L set pppoe iface em1 set link enable incoming And trying to connect, auth failed, here is mpd log: mpd: [em1-2] LCP: auth: peer wants nothing, I want CHAP mpd: [em1-2] CHAP: sending CHALLENGE #1 len: 21 mpd: [em1-2] LCP: LayerUp mpd: [em1-2] CHAP: rec'd RESPONSE #1 len: 58 mpd: [em1-2] Name: "test" mpd: [em1-2] AUTH: Trying RADIUS mpd: [em1-2] RADIUS: Authenticating user 'test' mpd: [em1-2] RADIUS: Rec'd RAD_ACCESS_REJECT for user 'test' mpd: [em1-2] AUTH: RADIUS returned: failed mpd: [em1-2] AUTH: ran out of backends mpd: [em1-2] CHAP: Auth return status: failed mpd: [em1-2] CHAP: Reply message: ^AE=691 R=1 mpd: [em1-2] CHAP: sending FAILURE #1 len: 14 mpd: [em1-2] LCP: authorization failed Then i start freeradius as radiusd -fX, and get this log: rad_recv: Access-Request packet from host 127.0.0.1 port 46400, id=223, length=282 NAS-Identifier = "rubin.svyaz-nt.ru" NAS-IP-Address = 127.0.0.1 Message-Authenticator = 0x14d36639bed8074ec2988118125367ea Acct-Session-Id = "815965-em1-2" NAS-Port = 2 NAS-Port-Type = Ethernet Service-Type = Framed-User Framed-Protocol = PPP Calling-Station-Id = "00e05290b3e3 / 00:e0:52:90:b3:e3 / em1" NAS-Port-Id = "em1" Vendor-12341-Attr-12 = 0x656d312d32 Tunnel-Medium-Type:0 = IEEE-802 Tunnel-Client-Endpoint:0 = "00:e0:52:90:b3:e3" User-Name = "test" MS-CHAP-Challenge = 0xbb1e68d5bbc30f228725a133877de83e MS-CHAP2-Response = 0x010088746ae65b68e435e9d045ad6f9569b60000000000000000b56991b4f20704cb6c68e5982eec5e98a7f4b470c109c1b9 # Executing section authorize from file /usr/local/etc/raddb/sites-enabled/default +- entering group authorize {...} ++[preprocess] returns ok ++[chap] returns noop [mschap] Found MS-CHAP attributes. Setting 'Auth-Type = mschap' ++[mschap] returns ok [eap] No EAP-Message, not doing EAP ++[eap] returns noop [files] users: Matched entry DEFAULT at line 172 ++[files] returns ok Found Auth-Type = MSCHAP # Executing group from file /usr/local/etc/raddb/sites-enabled/default +- entering group MS-CHAP {...} [mschap] No Cleartext-Password configured. Cannot create LM-Password. [mschap] No Cleartext-Password configured. Cannot create NT-Password. [mschap] Creating challenge hash with username: test [mschap] Client is using MS-CHAPv2 for test, we need NT-Password [mschap] FAILED: No NT/LM-Password. Cannot perform authentication. [mschap] FAILED: MS-CHAP2-Response is incorrect ++[mschap] returns reject Failed to authenticate the user. Login incorrect: [test] (from client localhost port 2 cli 00e05290b3e3 / 00:e0:52:90:b3:e3 / em1) Using Post-Auth-Type REJECT # Executing group from file /usr/local/etc/raddb/sites-enabled/default +- entering group REJECT {...} [attr_filter.access_reject] expand: %{User-Name} -> test attr_filter: Matched entry DEFAULT at line 11 ++[attr_filter.access_reject] returns updated Delaying reject of request 2 for 1 seconds Going to the next request Waking up in 0.9 seconds. Sending delayed reject for request 2 Sending Access-Reject of id 223 to 127.0.0.1 port 46400 MS-CHAP-Error = "\001E=691 R=1" Why i have error "[mschap] No Cleartext-Password configured. Cannot create LM-Password." ? I define cleartext-password in users. I check raddb/sites-enabled/default authorize { chap mschap eap { ok = return } files } looks ok for me. Whats wrong with mpd/chap/radius ?

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Having Hotlink Protectin problem in nginx

- by Ayaz Malik

Hello, i am having image hotlink protection problem in my nginx need help. i have a huge issue of my site's images being submited to social networks like stumbleupon with direct link ... xxxxx.jpg which some times get huge traffic and increases cpu usage plus bandwidth usage. what i am trying to do is block direct access to image from other refrers and hotlink protection. Here is the code from my vhost.conf server { access_log off; error_log logs/vhost-error_log warn; listen 80; server_name mydomain.com www.mydomain.com; # uncomment location below to make nginx serve static files instead of Apache # NOTE this will cause issues with bandwidth accounting as files wont be logged location ~* \.(gif|jpg|jpeg|png|wmv|avi|mpg|mpeg|mp4|htm|html|js|css)$ { root /home/username/public_html; expires 1d; } root /home/mydomain/public_html; } location / { client_max_body_size 10m; client_body_buffer_size 128k; proxy_send_timeout 90; proxy_read_timeout 90; proxy_buffer_size 4k; # you can increase proxy_buffers here to suppress "an upstream response # is buffered to a temporary file" warning proxy_buffers 16 32k; proxy_busy_buffers_size 64k; proxy_temp_file_write_size 64k; proxy_connect_timeout 30s; proxy_redirect http://www.mydomain.com:81 http://www.mydomain.com; proxy_redirect http://mydomain.com:81 http://mydomain.com; proxy_pass http://ip_address/; proxy_set_header Host $host; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; expires 24h; } } So for hotlink protection i added this code : location ~* (\.jpg|\.png|\.gif|\.jpeg)$ { valid_referers blocked www.mydomain.com mydomain.com; if ($invalid_referer) { return 403; } This is how the current nginx code for this domain looks like but didn't worked: server { access_log off; error_log logs/vhost-error_log warn; listen 80; server_name mydomain.com www.mydomain.com; # uncomment location below to make nginx serve static files instead of Apache # NOTE this will cause issues with bandwidth accounting as files wont be logged location ~* \.(gif|jpg|jpeg|png|wmv|avi|mpg|mpeg|mp4|htm|html|js|css)$ { root /home/username/public_html; expires 1d; } root /home/mydomain/public_html; } location ~* (\.jpg|\.png|\.gif|\.jpeg)$ { valid_referers blocked www.mydomain.com mydomain.com; if ($invalid_referer) { return 403; } location / { client_max_body_size 10m; client_body_buffer_size 128k; proxy_send_timeout 90; proxy_read_timeout 90; proxy_buffer_size 4k; # you can increase proxy_buffers here to suppress "an upstream response # is buffered to a temporary file" warning proxy_buffers 16 32k; proxy_busy_buffers_size 64k; proxy_temp_file_write_size 64k; proxy_connect_timeout 30s; proxy_redirect http://www.mydomain.com:81 http://www.mydomain.com; proxy_redirect http://mydomain.com:81 http://mydomain.com; proxy_pass http://ip_address/; proxy_set_header Host $host; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; expires 24h; } } Thank you in advance :) cheers

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Trouble in Nginx hotlink protection

- by Ayaz Malik

I am trying to implement image hotlink protection problem in nginx and I need help. I have a huge issue of my site's images being submitted to social networks like StumbleUpon with a direct link like http://example.com/xxxxx.jpg Which sometimes gets huge traffic and increases CPU usage and bandwidth usage. I want to block direct access to my images from other referrers and protect them from being hotlinked. Here is the code from my vhost.conf server { access_log off; error_log logs/vhost-error_log warn; listen 80; server_name mydomain.com www.mydomain.com; # uncomment location below to make nginx serve static files instead of Apache # NOTE this will cause issues with bandwidth accounting as files wont be logged location ~* \.(gif|jpg|jpeg|png|wmv|avi|mpg|mpeg|mp4|htm|html|js|css)$ { root /home/username/public_html; expires 1d; } root /home/mydomain/public_html; } location / { client_max_body_size 10m; client_body_buffer_size 128k; proxy_send_timeout 90; proxy_read_timeout 90; proxy_buffer_size 4k; # you can increase proxy_buffers here to suppress "an upstream response # is buffered to a temporary file" warning proxy_buffers 16 32k; proxy_busy_buffers_size 64k; proxy_temp_file_write_size 64k; proxy_connect_timeout 30s; proxy_redirect http://www.mydomain.com:81 http://www.mydomain.com; proxy_redirect http://mydomain.com:81 http://mydomain.com; proxy_pass http://ip_address/; proxy_set_header Host $host; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; expires 24h; } } For hotlink protection I added this code location ~* (\.jpg|\.png|\.gif|\.jpeg)$ { valid_referers blocked www.mydomain.com mydomain.com; if ($invalid_referer) { return 403; } This is the current nginx code for this domain, but it didn't work: server { access_log off; error_log logs/vhost-error_log warn; listen 80; server_name mydomain.com www.mydomain.com; # uncomment location below to make nginx serve static files instead of Apache # NOTE this will cause issues with bandwidth accounting as files wont be logged location ~* \.(gif|jpg|jpeg|png|wmv|avi|mpg|mpeg|mp4|htm|html|js|css)$ { root /home/username/public_html; expires 1d; } root /home/mydomain/public_html; } location ~* (\.jpg|\.png|\.gif|\.jpeg)$ { valid_referers blocked www.mydomain.com mydomain.com; if ($invalid_referer) { return 403; } location / { client_max_body_size 10m; client_body_buffer_size 128k; proxy_send_timeout 90; proxy_read_timeout 90; proxy_buffer_size 4k; # you can increase proxy_buffers here to suppress "an upstream response # is buffered to a temporary file" warning proxy_buffers 16 32k; proxy_busy_buffers_size 64k; proxy_temp_file_write_size 64k; proxy_connect_timeout 30s; proxy_redirect http://www.mydomain.com:81 http://www.mydomain.com; proxy_redirect http://mydomain.com:81 http://mydomain.com; proxy_pass http://ip_address/; proxy_set_header Host $host; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; expires 24h; } } How can I fix this?

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Email from my new vps is marked as spam

- by Chriswede

I got a new vps from x10vps (x10hosting) and set up the domain via cloudflare. This is what the email looks like: Delivered-To: [email protected] Received: by 10.64.19.240 with SMTP id i16csp357708iee; Tue, 9 Oct 2012 01:29:48 -0700 (PDT) Received: by 10.50.57.130 with SMTP id i2mr908846igq.56.1349771387599; Tue, 09 Oct 2012 01:29:47 -0700 (PDT) Return-Path: <[email protected]> Received: from power.SOURCEAPE.COM ([198.91.90.116]) by mx.google.com with ESMTPS id v8si25630942ica.46.2012.10.09.01.29.46 (version=TLSv1/SSLv3 cipher=OTHER); Tue, 09 Oct 2012 01:29:47 -0700 (PDT) Received-SPF: temperror (google.com: error in processing during lookup of [email protected]: DNS timeout) client-ip=198.91.90.116; Authentication-Results: mx.google.com; spf=temperror (google.com: error in processing during lookup of [email protected]: DNS timeout) [email protected] Received: from nk11p03mm-asmtp010.mac.com ([17.158.232.169]:54276) by power.SOURCEAPE.COM with esmtp (Exim 4.80) (envelope-from <[email protected]>) id 1TLVBD-0004Ig-1Y for [email protected]; Tue, 09 Oct 2012 12:28:43 +0400 I then tried to enable SPF and DKIM and got following massage In order to ensure that SPF or DKIM takes effect, you must confirm that this server is an authoritative nameserver for chvw.de. If you need help, contact your hosting provider. Status: Enabled Warning: cPanel is unable to verify that this server is an authoritative nameserver for chvw.de. [?] and the email header now looks like this: Delivered-To: [email protected] Received: by 10.50.183.227 with SMTP id ep3csp14506igc; Tue, 9 Oct 2012 01:55:23 -0700 (PDT) Received: by 10.50.40.133 with SMTP id x5mr992934igk.32.1349772923717; Tue, 09 Oct 2012 01:55:23 -0700 (PDT) Return-Path: <[email protected]> Received: from power.SOURCEAPE.COM ([198.91.90.116]) by mx.google.com with ESMTPS id ng8si25688859icb.42.2012.10.09.01.55.23 (version=TLSv1/SSLv3 cipher=OTHER); Tue, 09 Oct 2012 01:55:23 -0700 (PDT) Received-SPF: temperror (google.com: error in processing during lookup of [email protected]: DNS timeout) client-ip=198.91.90.116; Authentication-Results: mx.google.com; spf=temperror (google.com: error in processing during lookup of [email protected]: DNS timeout) [email protected]; dkim=neutral (bad format) [email protected] DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=chvw.de; s=default; h=Message-ID:Subject:To:From:Date:Content-Transfer-Encoding:Content-Type:MIME-Version; bh=iugsx3Lx0KnqjR7dj3wyQHnJ9pe/z3ntYEVk80k8rx4=; b=IrYsCtHdoPubXVOvLqxd7sLE/TyQTS5P3OrEg5SSUSKnQQcQ/fWWyBrmsrgkFSsw6jCmmRWMDR09vH5bQRpFPMA57B7pf8QRKhwXOWFBV+GnVUqICsfRjnNPvhx/lNp5; Received: from localhost ([127.0.0.1]:46539 helo=direct.chvw.de) by power.SOURCEAPE.COM with esmtpa (Exim 4.80) (envelope-from <[email protected]>) id 1TLVb0-0004dZ-Kd for [email protected]; Tue, 09 Oct 2012 12:55:22 +0400

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Upload Certificate and Key to RUEI in order to decrypt SSL traffic

- by stefan.thieme(at)oracle.com

So you want to monitor encrypted traffic with your RUEI collector ?Actually this is an easy thing if you follow the lines below...I will start out with creating a pair of snakeoil (so called self-signed) certificate and key with the make-ssl-cert tool which comes pre-packaged with apache only for the purpose of this example.$ sudo make-ssl-cert generate-default-snakeoil$ sudo ls -l /etc/ssl/certs/ssl-cert-snakeoil.pem /etc/ssl/private/ssl-cert-snakeoil.key-rw-r--r-- 1 root root 615 2010-06-07 10:03 /etc/ssl/certs/ssl-cert-snakeoil.pem-rw-r----- 1 root ssl-cert 891 2010-06-07 10:03 /etc/ssl/private/ssl-cert-snakeoil.keyRUEI Configuration of Security SSL Keys You will most likely get these two files from your Certificate Authority (CA) and/or your system administrators should be able to extract this from your WebServer or LoadBalancer handling SSL encryption for your infrastructure.Now let's look at the content of these two files, the certificate (apache assumes this is in PEM format) is called a public key and the private key is used by the apache server to encrypt traffic for a client using the certificate to initiate the SSL connection with the server.In case you already know that these two match, you simply have to paste them in one text file and upload this text file to your RUEI instance.$ sudo cat /etc/ssl/certs/ssl-cert-snakeoil.pem /etc/ssl/private/ssl-cert-snakeoil.key > /tmp/ruei.cert_and_key$ sudo cat /tmp/ruei.cert_and_key -----BEGIN CERTIFICATE----- MIIBmTCCAQICCQD7O3XXwVilWzANBgkqhkiG9w0BAQUFADARMQ8wDQYDVQQDEwZ1 YnVudHUwHhcNMTAwNjA3MDgwMzUzWhcNMjAwNjA0MDgwMzUzWjARMQ8wDQYDVQQD EwZ1YnVudHUwgZ8wDQYJKoZIhvcNAQEBBQADgY0AMIGJAoGBALbs+JnI+p+K7Iqa SQZdnYBxOpdRH0/9jt1QKvmH68v81h9+f1Z2rVR7Zrd/l+ruE3H9VvuzxMlKuMH7 qBX/gmjDZTlj9WJM+zc0tSk+e2udy9he20lGzTxv0vaykJkuKcvSWNk4WE9NuAdg IHZvjKgoTSVmvM1ApMCg69nyOy97AgMBAAEwDQYJKoZIhvcNAQEFBQADgYEAk2rv VEkxR1qPSpJiudDuGUHtWKBKWiWbmSwI3REZT+0vG+YDG5a55NdxgRk3zhQntqF7 gNYjKxblBByBpY7W0ci00kf7kFgvXWMeU96NSQJdnid/YxzQYn0dGL2rSh1dwdPN NPQlNSfnEQ1yxFevR7aRdCqTbTXU3mxi8YaSscE= -----END CERTIFICATE----- -----BEGIN RSA PRIVATE KEY----- MIICXgIBAAKBgQC27PiZyPqfiuyKmkkGXZ2AcTqXUR9P/Y7dUCr5h+vL/NYffn9W dq1Ue2a3f5fq7hNx/Vb7s8TJSrjB+6gV/4Jow2U5Y/ViTPs3NLUpPntrncvYXttJ Rs08b9L2spCZLinL0ljZOFhPTbgHYCB2b4yoKE0lZrzNQKTAoOvZ8jsvewIDAQAB AoGBAJ7LCWeeUwnKNFqBYmD3RTFpmX4furnal3lBDX0945BZtJr0WZ/6N679zIYA aiVTdGfgjvDC9lHy3n3uctRd0Jqdh2QoSSxNBhq5elIApNIIYzu7w/XI/VhGcDlA b6uadURQEC2q+M8YYjw3mwR2omhCWlHIViOHe/9T8jfP/8pxAkEA7k39WRcQildH DFKcj7gurqlkElHysacMTFWf0ZDTEUS6bdkmNXwK6mH63BlmGLrYAP5AMgKgeDf8 D+WRfv8YKQJBAMSCQ7UGDN3ysyfIIrdc1RBEAk4BOrKHKtD5Ux0z5lcQkaCYrK8J DuSldreN2yOhS99/S4CRWmGkTj04wRSnjwMCQQCaR5mW3QzTU4/m1XEQxsBKSdZE 2hMSmsCmhuSyK13Kl0FPLr/C7qyuc4KSjksABa8kbXaoKfUz/6LLs+ePXZ2JAkAv +mIPk5+WnQgS4XFgdYDrzL8HTpOHPSs+BHG/goltnnT/0ebvgXWqa5+1pyPm6h29 PrYveM2pY1Va6z1xDowDAkEAttfzAwAHz+FUhWQCmOBpvBuW/KhYWKZTMpvxFMSY YD5PH6NNyLfBx0J4nGPN5n/f6il0s9pzt3ko++/eUtWSnQ== -----END RSA PRIVATE KEY----- Simply click on the add new key and browse for the cert_and_key file on your desktop which you concatenated earlier using any text editor. You may need to add a passphrase in order to decrypt the RSA key in some cases (it should tell you BEGIN ENCRYPTED PRIVATE KEY in the header line). I will show you the success screen after uploading the certificate to RUEI. You may want to restart your collector once you have uploaded all the certificate/key pairs you want to use in order to make sure they get picked up asap.You should be able to see the number of SSL Connections rising in the Collector statistics screen below. The figures for decrypt errors should slowly go down and the usage figures for your encryption algortihm on the subsequent SSL Encryption screen should go up. You should be 100% sure everything works fine by now, otherwise see below to distinguish the remaining 1% from your 99% certainty.Verify Certificate and Key are matchingYou can compare the modulus of private key and public certificate and they should match in order for the key to fit the lock. You only want to make sure they both fit each other.We are actually interested only in the following details of the two files, which can be determined by using the -subject, -dates and -modulus command line switches instead of the complete -text output of the x509 certificate/rsa key contents.$ sudo openssl x509 -noout -subject -in /etc/ssl/certs/ssl-cert-snakeoil.pemsubject= /CN=ubuntu$ sudo openssl x509 -noout -dates -in /etc/ssl/certs/ssl-cert-snakeoil.pemnotBefore=Jun 7 08:03:53 2010 GMTnotAfter=Jun 4 08:03:53 2020 GMT$ sudo openssl x509 -noout -modulus -in /etc/ssl/certs/ssl-cert-snakeoil.pem Modulus=B6ECF899C8FA9F8AEC8A9A49065D9D80713A97511F4FFD8EDD502AF987EBCBFCD61F7E7F5676AD547B66B77F97EAEE1371FD56FBB3C4C94AB8C1FBA815FF8268C3653963F5624CFB3734B5293E7B6B9DCBD85EDB4946CD3C6FD2F6B290992E29CBD258D938584F4DB8076020766F8CA8284D2566BCCD40A4C0A0EBD9F23B2F7B $ sudo openssl rsa -noout -modulus -in /etc/ssl/private/ssl-cert-snakeoil.keyModulus=B6ECF899C8FA9F8AEC8A9A49065D9D80713A97511F4FFD8EDD502AF987EBCBFCD61F7E7F5676AD547B66B77F97EAEE1371FD56FBB3C4C94AB8C1FBA815FF8268C3653963F5624CFB3734B5293E7B6B9DCBD85EDB4946CD3C6FD2F6B290992E29CBD258D938584F4DB8076020766F8CA8284D2566BCCD40A4C0A0EBD9F23B2F7BAs you can see the modulus matches exactly and we have the proof that the certificate has been created using the private key. OpenSSL Certificate and Key DetailsAs I already told you, you do not need all the greedy details, but in case you want to know it in depth what is actually in those hex-blocks can be made visible with the following commands which show you the actual content in a human readable format.Note: You may not want to post all the details of your private key =^) I told you I have been using a self-signed certificate only for showing you these details.$ sudo openssl rsa -noout -text -in /etc/ssl/private/ssl-cert-snakeoil.keyPrivate-Key: (1024 bit)modulus: 00:b6:ec:f8:99:c8:fa:9f:8a:ec:8a:9a:49:06:5d: 9d:80:71:3a:97:51:1f:4f:fd:8e:dd:50:2a:f9:87: eb:cb:fc:d6:1f:7e:7f:56:76:ad:54:7b:66:b7:7f: 97:ea:ee:13:71:fd:56:fb:b3:c4:c9:4a:b8:c1:fb: a8:15:ff:82:68:c3:65:39:63:f5:62:4c:fb:37:34: b5:29:3e:7b:6b:9d:cb:d8:5e:db:49:46:cd:3c:6f: d2:f6:b2:90:99:2e:29:cb:d2:58:d9:38:58:4f:4d: b8:07:60:20:76:6f:8c:a8:28:4d:25:66:bc:cd:40: a4:c0:a0:eb:d9:f2:3b:2f:7bpublicExponent: 65537 (0x10001)privateExponent: 00:9e:cb:09:67:9e:53:09:ca:34:5a:81:62:60:f7: 45:31:69:99:7e:1f:ba:b9:da:97:79:41:0d:7d:3d: e3:90:59:b4:9a:f4:59:9f:fa:37:ae:fd:cc:86:00: 6a:25:53:74:67:e0:8e:f0:c2:f6:51:f2:de:7d:ee: 72:d4:5d:d0:9a:9d:87:64:28:49:2c:4d:06:1a:b9: 7a:52:00:a4:d2:08:63:3b:bb:c3:f5:c8:fd:58:46: 70:39:40:6f:ab:9a:75:44:50:10:2d:aa:f8:cf:18: 62:3c:37:9b:04:76:a2:68:42:5a:51:c8:56:23:87: 7b:ff:53:f2:37:cf:ff:ca:71prime1: 00:ee:4d:fd:59:17:10:8a:57:47:0c:52:9c:8f:b8: 2e:ae:a9:64:12:51:f2:b1:a7:0c:4c:55:9f:d1:90: d3:11:44:ba:6d:d9:26:35:7c:0a:ea:61:fa:dc:19: 66:18:ba:d8:00:fe:40:32:02:a0:78:37:fc:0f:e5: 91:7e:ff:18:29prime2: 00:c4:82:43:b5:06:0c:dd:f2:b3:27:c8:22:b7:5c: d5:10:44:02:4e:01:3a:b2:87:2a:d0:f9:53:1d:33: e6:57:10:91:a0:98:ac:af:09:0e:e4:a5:76:b7:8d: db:23:a1:4b:df:7f:4b:80:91:5a:61:a4:4e:3d:38: c1:14:a7:8f:03exponent1: 00:9a:47:99:96:dd:0c:d3:53:8f:e6:d5:71:10:c6: c0:4a:49:d6:44:da:13:12:9a:c0:a6:86:e4:b2:2b: 5d:ca:97:41:4f:2e:bf:c2:ee:ac:ae:73:82:92:8e: 4b:00:05:af:24:6d:76:a8:29:f5:33:ff:a2:cb:b3: e7:8f:5d:9d:89exponent2: 2f:fa:62:0f:93:9f:96:9d:08:12:e1:71:60:75:80: eb:cc:bf:07:4e:93:87:3d:2b:3e:04:71:bf:82:89: 6d:9e:74:ff:d1:e6:ef:81:75:aa:6b:9f:b5:a7:23: e6:ea:1d:bd:3e:b6:2f:78:cd:a9:63:55:5a:eb:3d: 71:0e:8c:03coefficient: 00:b6:d7:f3:03:00:07:cf:e1:54:85:64:02:98:e0: 69:bc:1b:96:fc:a8:58:58:a6:53:32:9b:f1:14:c4: 98:60:3e:4f:1f:a3:4d:c8:b7:c1:c7:42:78:9c:63: cd:e6:7f:df:ea:29:74:b3:da:73:b7:79:28:fb:ef: de:52:d5:92:9d$ sudo openssl x509 -noout -text -in /etc/ssl/certs/ssl-cert-snakeoil.pemCertificate: Data: Version: 1 (0x0) Serial Number: fb:3b:75:d7:c1:58:a5:5b Signature Algorithm: sha1WithRSAEncryption Issuer: CN=ubuntu Validity Not Before: Jun 7 08:03:53 2010 GMT Not After : Jun 4 08:03:53 2020 GMT Subject: CN=ubuntu Subject Public Key Info: Public Key Algorithm: rsaEncryption RSA Public Key: (1024 bit) Modulus (1024 bit): 00:b6:ec:f8:99:c8:fa:9f:8a:ec:8a:9a:49:06:5d: 9d:80:71:3a:97:51:1f:4f:fd:8e:dd:50:2a:f9:87: eb:cb:fc:d6:1f:7e:7f:56:76:ad:54:7b:66:b7:7f: 97:ea:ee:13:71:fd:56:fb:b3:c4:c9:4a:b8:c1:fb: a8:15:ff:82:68:c3:65:39:63:f5:62:4c:fb:37:34: b5:29:3e:7b:6b:9d:cb:d8:5e:db:49:46:cd:3c:6f: d2:f6:b2:90:99:2e:29:cb:d2:58:d9:38:58:4f:4d: b8:07:60:20:76:6f:8c:a8:28:4d:25:66:bc:cd:40: a4:c0:a0:eb:d9:f2:3b:2f:7b Exponent: 65537 (0x10001) Signature Algorithm: sha1WithRSAEncryption 93:6a:ef:54:49:31:47:5a:8f:4a:92:62:b9:d0:ee:19:41:ed: 58:a0:4a:5a:25:9b:99:2c:08:dd:11:19:4f:ed:2f:1b:e6:03: 1b:96:b9:e4:d7:71:81:19:37:ce:14:27:b6:a1:7b:80:d6:23: 2b:16:e5:04:1c:81:a5:8e:d6:d1:c8:b4:d2:47:fb:90:58:2f: 5d:63:1e:53:de:8d:49:02:5d:9e:27:7f:63:1c:d0:62:7d:1d: 18:bd:ab:4a:1d:5d:c1:d3:cd:34:f4:25:35:27:e7:11:0d:72: c4:57:af:47:b6:91:74:2a:93:6d:35:d4:de:6c:62:f1:86:92: b1:c1The above output can also be seen if you direct your browser client to your website and check the certificate sent by the server to your browser. You will be able to lookup all the details including the validity dates, subject common name and the public key modulus.Capture an SSL connection using WiresharkAnd as you would have expected, looking at the low-level tcp data that has been exchanged between the client and server with a tcp-diagnostics tool (i.e. wireshark/tcpdump) you can also see the modulus in there.These were the settings I used to capture all traffic on the local loopback interface, matching the filter expression: tcp and ip and host 127.0.0.1 and port 443. This tells Wireshark to leave out any other information, I may not have been interested in showing you.

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C#: LINQ vs foreach - Round 1.

- by James Michael Hare

So I was reading Peter Kellner's blog entry on Resharper 5.0 and its LINQ refactoring and thought that was very cool. But that raised a point I had always been curious about in my head -- which is a better choice: manual foreach loops or LINQ? The answer is not really clear-cut. There are two sides to any code cost arguments: performance and maintainability. The first of these is obvious and quantifiable. Given any two pieces of code that perform the same function, you can run them side-by-side and see which piece of code performs better. Unfortunately, this is not always a good measure. Well written assembly language outperforms well written C++ code, but you lose a lot in maintainability which creates a big techncial debt load that is hard to offset as the application ages. In contrast, higher level constructs make the code more brief and easier to understand, hence reducing technical cost. Now, obviously in this case we're not talking two separate languages, we're comparing doing something manually in the language versus using a higher-order set of IEnumerable extensions that are in the System.Linq library. Well, before we discuss any further, let's look at some sample code and the numbers. First, let's take a look at the for loop and the LINQ expression. This is just a simple find comparison: // find implemented via LINQ public static bool FindViaLinq(IEnumerable<int> list, int target) { return list.Any(item => item == target); } // find implemented via standard iteration public static bool FindViaIteration(IEnumerable<int> list, int target) { foreach (var i in list) { if (i == target) { return true; } } return false; } Okay, looking at this from a maintainability point of view, the Linq expression is definitely more concise (8 lines down to 1) and is very readable in intention. You don't have to actually analyze the behavior of the loop to determine what it's doing. So let's take a look at performance metrics from 100,000 iterations of these methods on a List<int> of varying sizes filled with random data. For this test, we fill a target array with 100,000 random integers and then run the exact same pseudo-random targets through both searches. List<T> On 100,000 Iterations Method Size Total (ms) Per Iteration (ms) % Slower Any 10 26 0.00046 30.00% Iteration 10 20 0.00023 - Any 100 116 0.00201 18.37% Iteration 100 98 0.00118 - Any 1000 1058 0.01853 16.78% Iteration 1000 906 0.01155 - Any 10,000 10,383 0.18189 17.41% Iteration 10,000 8843 0.11362 - Any 100,000 104,004 1.8297 18.27% Iteration 100,000 87,941 1.13163 - The LINQ expression is running about 17% slower for average size collections and worse for smaller collections. Presumably, this is due to the overhead of the state machine used to track the iterators for the yield returns in the LINQ expressions, which seems about right in a tight loop such as this. So what about other LINQ expressions? After all, Any() is one of the more trivial ones. I decided to try the TakeWhile() algorithm using a Count() to get the position stopped like the sample Pete was using in his blog that Resharper refactored for him into LINQ: // Linq form public static int GetTargetPosition1(IEnumerable<int> list, int target) { return list.TakeWhile(item => item != target).Count(); } // traditionally iterative form public static int GetTargetPosition2(IEnumerable<int> list, int target) { int count = 0; foreach (var i in list) { if(i == target) { break; } ++count; } return count; } Once again, the LINQ expression is much shorter, easier to read, and should be easier to maintain over time, reducing the cost of technical debt. So I ran these through the same test data: List<T> On 100,000 Iterations Method Size Total (ms) Per Iteration (ms) % Slower TakeWhile 10 41 0.00041 128% Iteration 10 18 0.00018 - TakeWhile 100 171 0.00171 88% Iteration 100 91 0.00091 - TakeWhile 1000 1604 0.01604 94% Iteration 1000 825 0.00825 - TakeWhile 10,000 15765 0.15765 92% Iteration 10,000 8204 0.08204 - TakeWhile 100,000 156950 1.5695 92% Iteration 100,000 81635 0.81635 - Wow! I expected some overhead due to the state machines iterators produce, but 90% slower? That seems a little heavy to me. So then I thought, well, what if TakeWhile() is not the right tool for the job? The problem is TakeWhile returns each item for processing using yield return, whereas our for-loop really doesn't care about the item beyond using it as a stop condition to evaluate. So what if that back and forth with the iterator state machine is the problem? Well, we can quickly create an (albeit ugly) lambda that uses the Any() along with a count in a closure (if a LINQ guru knows a better way PLEASE let me know!), after all , this is more consistent with what we're trying to do, we're trying to find the first occurence of an item and halt once we find it, we just happen to be counting on the way. This mostly matches Any(). // a new method that uses linq but evaluates the count in a closure. public static int TakeWhileViaLinq2(IEnumerable<int> list, int target) { int count = 0; list.Any(item => { if(item == target) { return true; } ++count; return false; }); return count; } Now how does this one compare? List<T> On 100,000 Iterations Method Size Total (ms) Per Iteration (ms) % Slower TakeWhile 10 41 0.00041 128% Any w/Closure 10 23 0.00023 28% Iteration 10 18 0.00018 - TakeWhile 100 171 0.00171 88% Any w/Closure 100 116 0.00116 27% Iteration 100 91 0.00091 - TakeWhile 1000 1604 0.01604 94% Any w/Closure 1000 1101 0.01101 33% Iteration 1000 825 0.00825 - TakeWhile 10,000 15765 0.15765 92% Any w/Closure 10,000 10802 0.10802 32% Iteration 10,000 8204 0.08204 - TakeWhile 100,000 156950 1.5695 92% Any w/Closure 100,000 108378 1.08378 33% Iteration 100,000 81635 0.81635 - Much better! It seems that the overhead of TakeAny() returning each item and updating the state in the state machine is drastically reduced by using Any() since Any() iterates forward until it finds the value we're looking for -- for the task we're attempting to do. So the lesson there is, make sure when you use a LINQ expression you're choosing the best expression for the job, because if you're doing more work than you really need, you'll have a slower algorithm. But this is true of any choice of algorithm or collection in general. Even with the Any() with the count in the closure it is still about 30% slower, but let's consider that angle carefully. For a list of 100,000 items, it was the difference between 1.01 ms and 0.82 ms roughly in a List<T>. That's really not that bad at all in the grand scheme of things. Even running at 90% slower with TakeWhile(), for the vast majority of my projects, an extra millisecond to save potential errors in the long term and improve maintainability is a small price to pay. And if your typical list is 1000 items or less we're talking only microseconds worth of difference. It's like they say: 90% of your performance bottlenecks are in 2% of your code, so over-optimizing almost never pays off. So personally, I'll take the LINQ expression wherever I can because they will be easier to read and maintain (thus reducing technical debt) and I can rely on Microsoft's development to have coded and unit tested those algorithm fully for me instead of relying on a developer to code the loop logic correctly. If something's 90% slower, yes, it's worth keeping in mind, but it's really not until you start get magnitudes-of-order slower (10x, 100x, 1000x) that alarm bells should really go off. And if I ever do need that last millisecond of performance? Well then I'll optimize JUST THAT problem spot. To me it's worth it for the readability, speed-to-market, and maintainability.

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nginx problem accessing virtual hosts

- by Sc0rian

I am setting up nginx as a reverse proxy. The server runs on directadmin and lamp stack. I have nginx running on port 81. I can access all my sites (including virtual ips) on the port 81. However when I forward the traffic from port 80 to 81, the virtual ips have a message saying "Apache is running normally". Server IPs are fine, and I can still access virtual IP's on 81. [root@~]# netstat -an | grep LISTEN | egrep ":80|:81" tcp 0 0 <virtual ip>:81 0.0.0.0:* LISTEN tcp 0 0 <virtual ip>:81 0.0.0.0:* LISTEN tcp 0 0 <serverip>:81 0.0.0.0:* LISTEN tcp 0 0 :::80 :::* LISTEN apache 24090 0.6 1.3 29252 13612 ? S 18:34 0:00 /usr/sbin/httpd -k start -DSSL apache 24092 0.9 2.1 39584 22056 ? S 18:34 0:00 /usr/sbin/httpd -k start -DSSL apache 24096 0.2 1.9 35892 20256 ? S 18:34 0:00 /usr/sbin/httpd -k start -DSSL apache 24120 0.3 1.7 35752 17840 ? S 18:34 0:00 /usr/sbin/httpd -k start -DSSL apache 24495 0.0 1.4 30892 14756 ? S 18:35 0:00 /usr/sbin/httpd -k start -DSSL apache 24496 1.0 2.1 39892 22164 ? S 18:35 0:00 /usr/sbin/httpd -k start -DSSL apache 24516 1.5 3.6 55496 38040 ? S 18:35 0:00 /usr/sbin/httpd -k start -DSSL apache 24519 0.1 1.2 28996 13224 ? S 18:35 0:00 /usr/sbin/httpd -k start -DSSL apache 24521 2.7 4.0 58244 41984 ? S 18:35 0:00 /usr/sbin/httpd -k start -DSSL apache 24522 0.0 1.2 29124 12672 ? S 18:35 0:00 /usr/sbin/httpd -k start -DSSL apache 24524 0.0 1.1 28740 12364 ? S 18:35 0:00 /usr/sbin/httpd -k start -DSSL apache 24535 1.1 1.7 36008 17876 ? S 18:35 0:00 /usr/sbin/httpd -k start -DSSL apache 24536 0.0 1.1 28592 12084 ? S 18:35 0:00 /usr/sbin/httpd -k start -DSSL apache 24537 0.0 1.1 28592 12112 ? S 18:35 0:00 /usr/sbin/httpd -k start -DSSL apache 24539 0.0 0.0 0 0 ? Z 18:35 0:00 [httpd] <defunct> apache 24540 0.0 1.1 28592 11540 ? S 18:35 0:00 /usr/sbin/httpd -k start -DSSL apache 24541 0.0 1.1 28592 11548 ? S 18:35 0:00 /usr/sbin/httpd -k start -DSSL root 24548 0.0 0.0 4132 752 pts/0 R+ 18:35 0:00 egrep apache|nginx root 28238 0.0 0.0 19576 284 ? Ss May29 0:00 nginx: master process /usr/local/nginx/sbin/nginx -c /usr/local/nginx/conf/nginx.conf apache 28239 0.0 0.0 19888 804 ? S May29 0:00 nginx: worker process apache 28240 0.0 0.0 19888 548 ? S May29 0:00 nginx: worker process apache 28241 0.0 0.0 19736 484 ? S May29 0:00 nginx: cache manager process here is my nginx conf: cat /usr/local/nginx/conf/nginx.conf user apache apache; worker_processes 2; # Set it according to what your CPU have. 4 Cores = 4 worker_rlimit_nofile 8192; pid /var/run/nginx.pid; events { worker_connections 1024; } http { include mime.types; default_type application/octet-stream; log_format main '$remote_addr - $remote_user [$time_local] ' '"$request" $status $body_bytes_sent "$http_referer" ' '"$http_user_agent" "$http_x_forwarded_for"'; server_tokens off; access_log /var/log/nginx_access.log main; error_log /var/log/nginx_error.log debug; server_names_hash_bucket_size 64; sendfile on; tcp_nopush on; tcp_nodelay off; keepalive_timeout 30; gzip on; gzip_comp_level 9; gzip_proxied any; proxy_buffering on; proxy_cache_path /usr/local/nginx/proxy_temp levels=1:2 keys_zone=one:15m inactive=7d max_size=1000m; proxy_buffer_size 16k; proxy_buffers 100 8k; proxy_connect_timeout 60; proxy_send_timeout 60; proxy_read_timeout 60; server { listen <server ip>:81 default rcvbuf=8192 sndbuf=16384 backlog=32000; # Real IP here server_name <server host name> _; # "_" is for handle all hosts that are not described by server_name charset off; access_log /var/log/nginx_host_general.access.log main; location / { proxy_set_header Host $host; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_pass http://<server ip>; # Real IP here client_max_body_size 16m; client_body_buffer_size 128k; proxy_buffering on; proxy_connect_timeout 90; proxy_send_timeout 90; proxy_read_timeout 120; proxy_buffer_size 16k; proxy_buffers 32 32k; proxy_busy_buffers_size 64k; proxy_temp_file_write_size 64k; } location /nginx_status { stub_status on; access_log off; allow 127.0.0.1; deny all; } } include /usr/local/nginx/vhosts/*.conf; } here is my vhost conf: # cat /usr/local/nginx/vhosts/1.conf server { listen <virt ip>:81 default rcvbuf=8192 sndbuf=16384 backlog=32000; # Real IP here server_name <virt domain name>.com ; # "_" is for handle all hosts that are not described by server_name charset off; access_log /var/log/nginx_host_general.access.log main; location / { proxy_set_header Host $host; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_pass http://<virt ip>; # Real IP here client_max_body_size 16m; client_body_buffer_size 128k; proxy_buffering on; proxy_connect_timeout 90; proxy_send_timeout 90; proxy_read_timeout 120; proxy_buffer_size 16k; proxy_buffers 32 32k; proxy_busy_buffers_size 64k; proxy_temp_file_write_size 64k; } }

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How to find vector for the quaternion from X Y Z rotations

- by can poyrazoglu

I am creating a very simple project on OpenGL and I'm stuck with rotations. I am trying to rotate an object indepentdently in all 3 axes: X, Y, and Z. I've had sleepless nights due to the "gimbal lock" problem after rotating about one axis. I've then learned that quaternions would solve my problem. I've researched about quaternions and implementd it, but I havent't been able to convert my rotations to quaternions. For example, if I want to rotate around Z axis 90 degrees, I just create the {0,0,1} vector for my quaternion and rotate it around that axis 90 degrees using the code here: http://iphonedevelopment.blogspot.com/2009/06/opengl-es-from-ground-up-part-7_04.html (the most complicated matrix towards the bottom) That's ok for one vector, but, say, I first want to rotate 90 degrees around Z, then 90 degrees around X (just as an example). What vector do I need to pass in? How do I calculate that vector. I am not good with matrices and trigonometry (I know the basics and the general rules, but I'm just not a whiz) but I need to get this done. There are LOTS of tutorials about quaternions, but I seem to understand none (or they don't answer my question). I just need to learn to construct the vector for rotations around more than one axis combined. UPDATE: I've found this nice page about quaternions and decided to implement them this way: http://www.cprogramming.com/tutorial/3d/quaternions.html Here is my code for quaternion multiplication: void cube::quatmul(float* q1, float* q2, float* resultRef){ float w = q1[0]*q2[0] - q1[1]*q2[1] - q1[2]*q2[2] - q1[3]*q2[3]; float x = q1[0]*q2[1] + q1[1]*q2[0] + q1[2]*q2[3] - q1[3]*q2[2]; float y = q1[0]*q2[2] - q1[1]*q2[3] + q1[2]*q2[0] + q1[3]*q2[1]; float z = q1[0]*q2[3] + q1[1]*q2[2] - q1[2]*q2[1] + q1[3]*q2[0]; resultRef[0] = w; resultRef[1] = x; resultRef[2] = y; resultRef[3] = z; } Here is my code for applying a quaternion to my modelview matrix (I have a tmodelview variable that is my target modelview matrix): void cube::applyquat(){ float& x = quaternion[1]; float& y = quaternion[2]; float& z = quaternion[3]; float& w = quaternion[0]; float magnitude = sqrtf(w * w + x * x + y * y + z * z); if(magnitude == 0){ x = 1; w = y = z = 0; }else if(magnitude != 1){ x /= magnitude; y /= magnitude; z /= magnitude; w /= magnitude; } tmodelview[0] = 1 - (2 * y * y) - (2 * z * z); tmodelview[1] = 2 * x * y + 2 * w * z; tmodelview[2] = 2 * x * z - 2 * w * y; tmodelview[3] = 0; tmodelview[4] = 2 * x * y - 2 * w * z; tmodelview[5] = 1 - (2 * x * x) - (2 * z * z); tmodelview[6] = 2 * y * z - 2 * w * x; tmodelview[7] = 0; tmodelview[8] = 2 * x * z + 2 * w * y; tmodelview[9] = 2 * y * z + 2 * w * x; tmodelview[10] = 1 - (2 * x * x) - (2 * y * y); tmodelview[11] = 0; glMatrixMode(GL_MODELVIEW); glPushMatrix(); glLoadMatrixf(tmodelview); glMultMatrixf(modelview); glGetFloatv(GL_MODELVIEW_MATRIX, tmodelview); glPopMatrix(); } And my code for rotation (that I call externally), where quaternion is a class variable of the cube: void cube::rotatex(int angle){ float quat[4]; float ang = angle * PI / 180.0; quat[0] = cosf(ang / 2); quat[1] = sinf(ang/2); quat[2] = 0; quat[3] = 0; quatmul(quat, quaternion, quaternion); applyquat(); } void cube::rotatey(int angle){ float quat[4]; float ang = angle * PI / 180.0; quat[0] = cosf(ang / 2); quat[1] = 0; quat[2] = sinf(ang/2); quat[3] = 0; quatmul(quat, quaternion, quaternion); applyquat(); } void cube::rotatez(int angle){ float quat[4]; float ang = angle * PI / 180.0; quat[0] = cosf(ang / 2); quat[1] = 0; quat[2] = 0; quat[3] = sinf(ang/2); quatmul(quat, quaternion, quaternion); applyquat(); } I call, say rotatex, for 10-11 times for rotating only 1 degree, but my cube gets rotated almost 90 degrees after 10-11 times of 1 degree, which doesn't make sense. Also, after calling rotation functions in different axes, My cube gets skewed, gets 2 dimensional, and disappears (a column in modelview matrix becomes all zeros) irreversibly, which obviously shouldn't be happening with a correct implementation of the quaternions.

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Apache server still running but user can not connect website, after "sudo apachectl restart" user can connect website, what'r wrong? [on hold]

- by Tinyfool

My website is http://ourcoders.com/, recently I found sometime user report can not connect to my website, but I ssh to server, I found Apache still running, like this: root@AY1401261057077842eaZ:~# ps aux|grep apache root 873 0.0 1.3 290496 13528 ? Ss Aug18 0:28 /usr/sbin/apache2 -k start www-data 3490 0.0 1.8 299004 18764 ? S Aug21 0:01 /usr/sbin/apache2 -k start www-data 3612 0.0 1.5 296008 15540 ? S Aug21 0:03 /usr/sbin/apache2 -k start www-data 3860 0.0 1.5 296636 16268 ? S Aug21 0:00 /usr/sbin/apache2 -k start www-data 3913 0.0 1.2 295468 13084 ? S Aug21 0:00 /usr/sbin/apache2 -k start www-data 3931 0.0 1.7 298488 18228 ? S 16:02 0:01 /usr/sbin/apache2 -k start www-data 3938 0.0 1.9 299128 19724 ? S 16:02 0:02 /usr/sbin/apache2 -k start www-data 4465 0.0 1.6 296688 16404 ? S Aug21 0:00 /usr/sbin/apache2 -k start www-data 5075 0.0 1.2 295468 13044 ? S 16:16 0:00 /usr/sbin/apache2 -k start www-data 5153 0.0 1.5 295880 15612 ? S 16:17 0:00 /usr/sbin/apache2 -k start www-data 5770 0.0 1.5 296608 16016 ? S 16:30 0:00 /usr/sbin/apache2 -k start www-data 5773 0.0 1.6 296948 16640 ? S 16:30 0:00 /usr/sbin/apache2 -k start www-data 5816 0.0 1.6 297216 16976 ? S 16:31 0:01 /usr/sbin/apache2 -k start www-data 5918 0.0 1.7 298228 17820 ? S 16:33 0:01 /usr/sbin/apache2 -k start www-data 6023 0.0 1.9 299864 19840 ? S 16:35 0:13 /usr/sbin/apache2 -k start www-data 6073 0.0 1.7 298480 18120 ? S 16:36 0:02 /usr/sbin/apache2 -k start www-data 6088 0.0 2.0 300488 21008 ? S 16:36 0:12 /usr/sbin/apache2 -k start www-data 6114 0.0 1.7 298548 18268 ? S 16:37 0:12 /usr/sbin/apache2 -k start www-data 6134 0.0 1.6 296688 16532 ? S 16:37 0:04 /usr/sbin/apache2 -k start www-data 6193 0.0 1.7 297908 17420 ? S 16:38 0:08 /usr/sbin/apache2 -k start www-data 6821 0.0 1.8 299556 19072 ? S 16:43 0:11 /usr/sbin/apache2 -k start www-data 7058 0.0 1.7 298676 18204 ? S 16:48 0:10 /usr/sbin/apache2 -k start www-data 7065 0.0 1.8 299028 18868 ? S 16:48 0:11 /usr/sbin/apache2 -k start www-data 7084 0.0 1.8 299508 19020 ? S 16:48 0:11 /usr/sbin/apache2 -k start www-data 7221 0.0 1.8 299160 18768 ? S 16:51 0:09 /usr/sbin/apache2 -k start www-data 11453 0.0 1.7 298484 18256 ? S 09:39 0:02 /usr/sbin/apache2 -k start root 26324 0.0 0.0 8084 920 pts/0 S+ 22:52 0:00 grep --color=auto apache root 28517 0.0 0.0 4404 612 ? S Aug21 0:00 /bin/sh -c /usr/sbin/cronolog /var/log/apache2/cocoa/%Y/%m/access-%Y-%m-%d.log root 28518 0.0 0.0 4404 616 ? S Aug21 0:00 /bin/sh -c /usr/sbin/cronolog /var/log/apache2/cocoa/%Y/%m/access-%Y-%m-%d.log root 28519 0.0 0.0 4404 612 ? S Aug21 0:00 /bin/sh -c /usr/sbin/cronolog /var/log/apache2/cocoa/%Y/%m/access-%Y-%m-%d.log root 28520 0.0 0.0 4404 616 ? S Aug21 0:00 /bin/sh -c /usr/sbin/cronolog /var/log/apache2/cocoa/%Y/%m/access-%Y-%m-%d.log root 28521 0.0 0.0 4312 552 ? S Aug21 0:00 /usr/sbin/cronolog /var/log/apache2/cocoa/%Y/%m/access-%Y-%m-%d.log root 28522 0.0 0.0 4308 548 ? S Aug21 0:07 /usr/sbin/cronolog /var/log/apache2/cocoa/%Y/%m/access-%Y-%m-%d.log root 28523 0.0 0.0 4176 352 ? S Aug21 0:00 /usr/sbin/cronolog /var/log/apache2/cocoa/%Y/%m/access-%Y-%m-%d.log root 28524 0.0 0.0 4180 356 ? S Aug21 0:00 /usr/sbin/cronolog /var/log/apache2/cocoa/%Y/%m/access-%Y-%m-%d.log Today's only error log is blow. [Sat Aug 23 22:52:47 2014] [notice] SIGHUP received. Attempting to restart [Sat Aug 23 22:52:47 2014] [notice] Apache/2.2.22 (Ubuntu) PHP/5.3.10-1ubuntu3.13 with Suhosin-Patch configured -- resuming normal operations traffic information: cat access-2014-08-23.log | cut -d " " -f4 |cut -d":" -f2 |sort|uniq -c |sort -nr 5692 14 5291 15 5083 16 4723 23 4463 12 4057 17 4011 11 3926 13 3852 10 3187 05 3176 09 3055 06 2790 07 2672 00 2608 02 2591 01 2577 04 2514 03 2497 08 707 22 88 18 After I use "sudo apachectl restart", user can connect my website. So I want to know? What is the problem? And if "sudo apachectl restart" is needed, can I automate run this command? Today this kind struts appear again, and I run netstat -a -n Proto Recv-Q Send-Q Local Address Foreign Address State tcp 0 0 127.0.0.1:3306 0.0.0.0:* LISTEN tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN tcp 0 0 115.28.146.116:80 125.39.208.120:50708 SYN_RECV tcp 0 0 115.28.146.116:80 125.39.208.158:50278 SYN_RECV tcp 0 0 115.28.146.116:80 220.173.142.152:23320 SYN_RECV tcp 0 0 115.28.146.116:80 60.173.247.132:52851 SYN_RECV tcp 0 0 115.28.146.116:80 125.39.208.158:39397 SYN_RECV tcp 0 0 115.28.146.116:80 125.39.208.158:56894 SYN_RECV tcp 0 0 115.28.146.116:80 183.129.174.2:21291 SYN_RECV tcp 0 0 115.28.146.116:80 125.39.208.120:44499 SYN_RECV tcp 0 0 115.28.146.116:80 125.39.208.120:34017 SYN_RECV tcp 0 0 115.28.146.116:80 124.65.50.210:3774 SYN_RECV tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN tcp 0 0 127.0.0.1:15770 0.0.0.0:* LISTEN tcp 1 0 115.28.146.116:80 14.127.65.219:61633 CLOSE_WAIT tcp 305 0 115.28.146.116:80 125.39.208.120:37593 ESTABLISHED tcp 0 0 10.144.142.201:52866 10.146.6.61:3306 TIME_WAIT tcp 0 0 10.144.142.201:52873 10.146.6.61:3306 TIME_WAIT tcp 0 0 10.144.142.201:52868 10.146.6.61:3306 TIME_WAIT tcp 343 0 115.28.146.116:80 182.118.20.215:50709 ESTABLISHED tcp 0 0 115.28.146.116:54784 173.194.127.243:80 ESTABLISHED tcp 1 0 115.28.146.116:80 116.192.2.185:41253 CLOSE_WAIT tcp 0 0 10.144.142.201:52876 10.146.6.61:3306 ESTABLISHED tcp 559 0 115.28.146.116:80 218.241.144.114:54501 ESTABLISHED tcp 376 0 115.28.146.116:80 116.213.196.119:50604 CLOSE_WAIT tcp 1 0 115.28.146.116:80 113.36.238.28:59339 CLOSE_WAIT tcp 214 0 115.28.146.116:80 142.4.215.40:34443 ESTABLISHED tcp 0 0 115.28.146.116:48635 115.28.146.116:80 ESTABLISHED tcp 187 0 115.28.146.116:80 115.28.146.116:48635 ESTABLISHED tcp 0 0 10.144.142.201:52853 10.146.6.61:3306 TIME_WAIT tcp 594 0 115.28.146.116:80 183.129.174.2:7090 CLOSE_WAIT tcp 0 0 10.144.142.201:52874 10.146.6.61:3306 TIME_WAIT tcp 0 0 115.28.146.116:80 182.118.20.166:44081 TIME_WAIT tcp 1 0 115.28.146.116:80 113.36.238.28:59028 CLOSE_WAIT tcp 1 0 115.28.146.116:80 14.127.65.219:61665 CLOSE_WAIT tcp 0 0 10.144.142.201:52860 10.146.6.61:3306 TIME_WAIT tcp 0 0 10.144.142.201:46983 10.146.6.61:3306 ESTABLISHED tcp 0 2290 115.28.146.116:80 14.154.179.243:41049 FIN_WAIT1 tcp 0 0 10.144.142.201:42900 10.146.6.61:3306 ESTABLISHED tcp 571 0 115.28.146.116:80 220.173.142.152:23295 CLOSE_WAIT tcp 1 0 115.28.146.116:80 113.36.238.28:59337 CLOSE_WAIT tcp 438 0 115.28.146.116:80 42.120.74.202:31567 CLOSE_WAIT tcp 0 0 115.28.146.116:80 113.36.238.28:59498 ESTABLISHED tcp 259 0 115.28.146.116:80 66.249.65.56:36739 ESTABLISHED tcp 0 0 115.28.146.116:80 113.36.238.28:59341 ESTABLISHED tcp 0 0 115.28.146.116:80 142.4.215.40:34267 FIN_WAIT2 tcp 799 0 115.28.146.116:80 180.173.88.1:52779 ESTABLISHED tcp 0 0 115.28.146.116:80 117.136.25.132:25207 FIN_WAIT2 tcp 0 0 115.28.146.116:80 220.181.108.186:42540 TIME_WAIT tcp 0 0 10.144.142.201:59902 10.242.174.13:80 TIME_WAIT tcp 0 1820 115.28.146.116:80 218.22.140.90:39266 LAST_ACK tcp 0 0 115.28.146.116:80 66.249.65.64:56977 TIME_WAIT tcp 669 0 115.28.146.116:80 83.251.90.61:49664 ESTABLISHED tcp 0 0 10.144.142.201:52872 10.146.6.61:3306 TIME_WAIT tcp 233 0 115.28.146.116:80 54.202.88.0:43398 CLOSE_WAIT tcp 479 0 115.28.146.116:80 65.49.44.149:25739 ESTABLISHED tcp 378 0 115.28.146.116:80 148.251.124.173:39313 CLOSE_WAIT tcp 1 0 115.28.146.116:80 14.127.65.219:61697 CLOSE_WAIT tcp 1 0 115.28.146.116:80 49.4.158.2:52986 CLOSE_WAIT tcp 769 0 115.28.146.116:80 14.127.65.219:61537 ESTABLISHED tcp 0 0 10.144.142.201:52859 10.146.6.61:3306 TIME_WAIT tcp 0 0 10.144.142.201:55734 10.164.2.163:9200 TIME_WAIT tcp 563 0 115.28.146.116:80 202.55.20.10:22577 CLOSE_WAIT tcp 194 0 115.28.146.116:80 37.58.100.165:50908 CLOSE_WAIT tcp 791 0 115.28.146.116:80 116.192.2.185:45628 ESTABLISHED tcp 709 0 115.28.146.116:80 113.116.61.178:65209 ESTABLISHED tcp 706 0 115.28.146.116:80 183.227.44.237:54519 ESTABLISHED tcp 301 0 115.28.146.116:80 118.198.243.127:31180 ESTABLISHED tcp 0 0 10.144.142.201:55721 10.164.2.163:9200 TIME_WAIT tcp 0 0 10.144.142.201:55726 10.164.2.163:9200 TIME_WAIT tcp 0 0 10.144.142.201:55723 10.164.2.163:9200 TIME_WAIT tcp 681 0 115.28.146.116:80 83.251.90.61:49662 ESTABLISHED tcp 0 0 115.28.146.116:80 83.251.90.61:65274 TIME_WAIT tcp 1 0 115.28.146.116:80 113.36.238.28:59022 CLOSE_WAIT tcp 1 0 115.28.146.116:80 180.173.88.1:52781 CLOSE_WAIT tcp 1 0 115.28.146.116:80 113.36.238.28:59037 CLOSE_WAIT tcp 0 0 10.144.142.201:55728 10.164.2.163:9200 TIME_WAIT tcp 231 0 115.28.146.116:37596 110.75.102.62:80 CLOSE_WAIT tcp 1 0 115.28.146.116:80 14.127.65.219:61569 CLOSE_WAIT tcp 0 0 10.144.142.201:51310 10.146.6.61:3306 ESTABLISHED tcp 299 0 115.28.146.116:80 123.125.71.16:36281 ESTABLISHED tcp 0 0 115.28.146.116:48620 115.28.146.116:80 ESTABLISHED tcp 1 0 115.28.146.116:80 183.227.44.237:54520 CLOSE_WAIT tcp 1 0 115.28.146.116:80 113.36.238.28:59026 CLOSE_WAIT tcp 479 0 115.28.146.116:80 65.49.44.149:5490 ESTABLISHED tcp 665 0 115.28.146.116:80 83.251.90.61:49663 ESTABLISHED tcp 0 0 115.28.146.116:53744 173.194.127.147:80 ESTABLISHED tcp 1 0 115.28.146.116:80 113.36.238.28:59023 CLOSE_WAIT tcp 0 0 115.28.146.116:22 116.192.2.185:34205 ESTABLISHED tcp 333 0 115.28.146.116:80 149.174.113.111:54338 CLOSE_WAIT tcp 0 0 10.144.142.201:52861 10.146.6.61:3306 TIME_WAIT tcp 0 0 10.144.142.201:52863 10.146.6.61:3306 TIME_WAIT tcp 1 0 115.28.146.116:80 116.192.2.185:43272 CLOSE_WAIT tcp 767 0 115.28.146.116:80 49.4.158.2:52947 CLOSE_WAIT tcp 668 0 115.28.146.116:80 83.251.90.61:49665 ESTABLISHED tcp 642 0 115.28.146.116:80 222.78.185.50:55788 ESTABLISHED tcp 710 0 115.28.146.116:80 113.116.61.178:65264 ESTABLISHED tcp 284 0 115.28.146.116:80 157.55.39.243:65185 ESTABLISHED tcp 450 0 115.28.146.116:80 65.49.44.149:55496 ESTABLISHED tcp 1 0 115.28.146.116:80 116.192.2.185:36629 CLOSE_WAIT tcp 233 0 115.28.146.116:80 54.202.88.0:42424 CLOSE_WAIT tcp 187 0 115.28.146.116:80 115.28.146.116:48620 ESTABLISHED tcp 1 0 115.28.146.116:80 14.127.65.219:61601 CLOSE_WAIT tcp 776 0 115.28.146.116:80 202.118.253.102:64883 CLOSE_WAIT tcp 841 0 115.28.146.116:80 37.228.105.28:49472 ESTABLISHED tcp 787 0 115.28.146.116:80 112.65.226.198:52192 ESTABLISHED tcp 0 0 10.144.142.201:55717 10.164.2.163:9200 TIME_WAIT tcp 233 0 115.28.146.116:80 54.202.88.0:42855 CLOSE_WAIT tcp 379 0 115.28.146.116:80 101.226.166.219:2322 ESTABLISHED tcp 0 0 115.28.146.116:80 183.60.212.152:43063 CLOSE_WAIT tcp 1 0 115.28.146.116:80 180.173.88.1:52780 CLOSE_WAIT tcp 784 0 115.28.146.116:80 101.95.29.26:63094 ESTABLISHED tcp 463 0 115.28.146.116:80 65.49.44.149:53876 ESTABLISHED tcp 1 0 115.28.146.116:80 116.192.2.185:37946 CLOSE_WAIT tcp 479 0 115.28.146.116:80 65.49.44.149:41157 ESTABLISHED tcp 1 0 115.28.146.116:80 113.36.238.28:59036 CLOSE_WAIT tcp 1 0 115.28.146.116:80 49.4.158.2:52984 CLOSE_WAIT tcp 1 0 115.28.146.116:80 116.192.2.185:38100 CLOSE_WAIT tcp 0 0 10.144.142.201:52865 10.146.6.61:3306 TIME_WAIT tcp 1 0 115.28.146.116:80 113.36.238.28:59027 CLOSE_WAIT tcp 0 0 115.28.146.116:36508 173.194.127.81:80 ESTABLISHED tcp 210 0 115.28.146.116:80 188.143.232.123:47775 ESTABLISHED tcp 1 0 115.28.146.116:80 113.36.238.28:59025 CLOSE_WAIT tcp 0 0 10.144.142.201:52857 10.146.6.61:3306 TIME_WAIT tcp 654 0 115.28.146.116:80 49.4.158.2:52985 ESTABLISHED tcp 0 0 115.28.146.116:58627 110.75.102.62:80 ESTABLISHED tcp 782 0 115.28.146.116:80 180.153.219.13:40293 ESTABLISHED tcp 792 0 115.28.146.116:80 116.192.2.185:48187 CLOSE_WAIT tcp6 0 0 :::22 :::* LISTEN udp 0 0 115.28.146.116:123 0.0.0.0:* udp 0 0 10.144.142.201:123 0.0.0.0:* udp 0 0 127.0.0.1:123 0.0.0.0:* udp 0 0 0.0.0.0:123 0.0.0.0:* udp6 0 0 :::123 :::* Active UNIX domain sockets (servers and established) Proto RefCnt Flags Type State I-Node Path unix 2 [ ACC ] STREAM LISTENING 8447 /var/run/mysqld/mysqld.sock unix 2 [ ACC ] SEQPACKET LISTENING 6678 /run/udev/control unix 2 [ ACC ] STREAM LISTENING 6482 @/com/ubuntu/upstart unix 2 [ ACC ] STREAM LISTENING 7543 /var/run/dbus/system_bus_socket unix 7 [ ] DGRAM 7551 /dev/log unix 2 [ ACC ] STREAM LISTENING 7650 /var/run/nscd/socket unix 2 [ ] DGRAM 7156424 unix 3 [ ] STREAM CONNECTED 7156137 /var/run/dbus/system_bus_socket unix 3 [ ] STREAM CONNECTED 7156136 unix 2 [ ] DGRAM 7156135 unix 2 [ ] DGRAM 7155834 unix 2 [ ] DGRAM 9734 unix 3 [ ] STREAM CONNECTED 9151 /var/run/dbus/system_bus_socket unix 3 [ ] STREAM CONNECTED 9150 unix 3 [ ] STREAM CONNECTED 9136 /var/run/dbus/system_bus_socket unix 3 [ ] STREAM CONNECTED 9135 unix 3 [ ] STREAM CONNECTED 9106 /var/run/dbus/system_bus_socket unix 3 [ ] STREAM CONNECTED 9105 unix 2 [ ] DGRAM 9073 unix 3 [ ] STREAM CONNECTED 7575 /var/run/dbus/system_bus_socket unix 3 [ ] STREAM CONNECTED 7574 unix 3 [ ] STREAM CONNECTED 7565 unix 3 [ ] STREAM CONNECTED 7564 unix 3 [ ] STREAM CONNECTED 7332 @/com/ubuntu/upstart unix 3 [ ] STREAM CONNECTED 7330 unix 3 [ ] DGRAM 6712 unix 3 [ ] DGRAM 6711 unix 3 [ ] STREAM CONNECTED 6662 @/com/ubuntu/upstart unix 3 [ ] STREAM CONNECTED 6635

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It's like I'm in recovery mode after update, but I'm not

- by mawburn

I used the Ubuntu software updater and updated to the most recent packages. After the last update today, it's like I have gone into recovery mode, but I haven't. I am running UbuntuGNOME First, everything looks like this: Switching to dark mode does nothing. Also, default applications do not work. Such as Startup and the default screenshot application. Everything was working fine before the latest software update. System Info Ubuntu 14.04 LTS Gnome-Shell 3.10.4 Kernel 3.13.0-29 I can't figure out how to get an update history, but this is almost a fresh install. It's about a week old install and this is the 3rd time I've used the Ubuntu Software Update. I am running AMD ATI HD6700 with the proprietary Catalyst drivers. I tried to provide all information that I thought would be useful, if you need any more please let me know. Edit - I believe something went wrong within these updates: Update Log: Start-Date: 2014-06-09 19:07:07 Commandline: aptdaemon role='role-commit-packages' sender=':1.68' Install: libgnome-desktop-3-10:amd64 (3.12.0-0~eugenesan~trusty2) Upgrade: gnome-session-common:amd64 (3.9.90-0ubuntu12, 3.12.0-0~eugenesan~trusty10), gnome-session-bin:amd64 (3.9.90-0ubuntu12, 3.12.0-0~eugenesan~trusty10), gir1.2-gnomedesktop-3.0:amd64 (3.8.4-0ubuntu3, 3.12.0-0~eugenesan~trusty2), gnome-session:amd64 (3.9.90-0ubuntu12, 3.12.0-0~eugenesan~trusty10), python-libxml2:amd64 (2.9.1+dfsg1-3ubuntu4.1, 2.9.1+dfsg1-3ubuntu4.2), libspice-server1:amd64 (0.12.4-0nocelt2, 0.12.4-0nocelt2.02~eugenesan~trusty1), gir1.2-mutter-3.0:amd64 (3.10.4-0ubuntu2, 3.10.4-0ubuntu2.1), xserver-xorg-video-qxl:amd64 (0.1.1-0ubuntu3, 0.1.1-0ubuntu3.01), libxml2:amd64 (2.9.1+dfsg1-3ubuntu4.1, 2.9.1+dfsg1-3ubuntu4.2), libxml2:i386 (2.9.1+dfsg1-3ubuntu4.1, 2.9.1+dfsg1-3ubuntu4.2), gnome-desktop3-data:amd64 (3.8.4-0ubuntu3, 3.12.0-0~eugenesan~trusty2), mutter:amd64 (3.10.4-0ubuntu2, 3.10.4-0ubuntu2.1), mutter-common:amd64 (3.10.4-0ubuntu2, 3.10.4-0ubuntu2.1), libxml2-utils:amd64 (2.9.1+dfsg1-3ubuntu4.1, 2.9.1+dfsg1-3ubuntu4.2), libmutter0c:amd64 (3.10.4-0ubuntu2, 3.10.4-0ubuntu2.1) End-Date: 2014-06-09 19:07:12 I also installed Citrix Receiver today, following the tutorial here: Citrix Receiver 12.1 on Ubuntu 14.04 64-bit Log Start-Date: 2014-06-09 18:59:06 Commandline: apt-get install libmotif4:i386 nspluginwrapper lib32z1 libc6-i386 libxp6:i386 libxpm4:i386 libasound2:i386 Install: libmotif-common:amd64 (2.3.4-5, automatic), libatk1.0-0:i386 (2.10.0-2ubuntu2, automatic), libxft2:i386 (2.3.1-2, automatic), libgraphite2-3:i386 (1.2.4-1ubuntu1, automatic), nspluginviewer:i386 (1.4.4-0ubuntu5, automatic), libpango-1.0-0:i386 (1.36.3-1ubuntu1, automatic), libxcursor1:i386 (1.1.14-1, automatic), libmotif4:i386 (2.3.4-5), libxm4:amd64 (2.3.4-5, automatic), libxm4:i386 (2.3.4-5, automatic), libxp6:i386 (1.0.2-1ubuntu1), libpangocairo-1.0-0:i386 (1.36.3-1ubuntu1, automatic), libxcb-render0:i386 (1.10-2ubuntu1, automatic), libthai0:i386 (0.1.20-3, automatic), libharfbuzz0b:i386 (0.9.27-1, automatic), libpixman-1-0:i386 (0.30.2-2ubuntu1, automatic), libpangoft2-1.0-0:i386 (1.36.3-1ubuntu1, automatic), libcairo2:i386 (1.13.0~20140204-0ubuntu1, automatic), lib32z1:amd64 (1.2.8.dfsg-1ubuntu1), libjasper1:i386 (1.900.1-14ubuntu3, automatic), libgtk2.0-0:i386 (2.24.23-0ubuntu1.1, automatic), nspluginwrapper:amd64 (1.4.4-0ubuntu5), libuil4:amd64 (2.3.4-5, automatic), libuil4:i386 (2.3.4-5, automatic), libxcb-shm0:i386 (1.10-2ubuntu1, automatic), libxmu6:i386 (1.1.1-1, automatic), libc6-i386:amd64 (2.19-0ubuntu6), libxinerama1:i386 (1.1.3-1, automatic), libgdk-pixbuf2.0-0:i386 (2.30.7-0ubuntu1, automatic), libxcomposite1:i386 (0.4.4-1, automatic), libmrm4:amd64 (2.3.4-5, automatic), libmrm4:i386 (2.3.4-5, automatic), libdatrie1:i386 (0.2.8-1, automatic), libxrandr2:i386 (1.4.2-1, automatic), libxpm4:i386 (3.5.10-1) End-Date: 2014-06-09 18:59:11

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Single player 'pong' game

- by Jam

I am just starting out learning pygame and livewires, and I'm trying to make a single-player pong game, where you just hit the ball, and it bounces around until it passes your paddle (located on the left side of the screen and controlled by the mouse), which makes you lose. I have the basic code, but the ball doesn't stay on the screen, it just flickers and doesn't remain constant. Also, the paddle does not move with the mouse. I'm sure I'm missing something simple, but I just can't figure it out. Help please! Here's what I have: from livewires import games import random games.init(screen_width=640, screen_height=480, fps=50) class Paddle(games.Sprite): image=games.load_image("paddle.bmp") def __init__(self, x=10): super(Paddle, self).__init__(image=Paddle.image, y=games.mouse.y, left=10) self.score=games.Text(value=0, size=25, top=5, right=games.screen.width - 10) games.screen.add(self.score) def update(self): self.y=games.mouse.y if self.top<0: self.top=0 if self.bottom>games.screen.height: self.bottom=games.screen.height self.check_collide() def check_collide(self): for ball in self.overlapping_sprites: self.score.value+=1 ball.handle_collide() class Ball(games.Sprite): image=games.load_image("ball.bmp") speed=5 def __init__(self, x=90, y=90): super(Ball, self).__init__(image=Ball.image, x=x, y=y, dx=Ball.speed, dy=Ball.speed) def update(self): if self.right>games.screen.width: self.dx=-self.dx if self.bottom>games.screen.height or self.top<0: self.dy=-self.dy if self.left<0: self.end_game() self.destroy() def handle_collide(self): self.dx=-self.dx def end_game(self): end_message=games.Message(value="Game Over", size=90, x=games.screen.width/2, y=games.screen.height/2, lifetime=250, after_death=games.screen.quit) games.screen.add(end_message) def main(): background_image=games.load_image("background.bmp", transparent=False) games.screen.background=background_image paddle_image=games.load_image("paddle.bmp") the_paddle=games.Sprite(image=paddle_image, x=10, y=games.mouse.y) games.screen.add(the_paddle) ball_image=games.load_image("ball.bmp") the_ball=games.Sprite(image=ball_image, x=630, y=200, dx=2, dy=2) games.screen.add(the_ball) games.mouse.is_visible=False games.screen.event_grab=True games.screen.mainloop() main()

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nginx serving Django static media | 502 bad gateway

- by MMRUser

I'm trying to serve Django static media through nginx, Here's my nginx.conf server { listen 7777; listen localhost:7777; server_name example.com; location / { proxy_pass http://localhost:7777; proxy_redirect off; proxy_set_header Host $host; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; client_max_body_size 10m; client_body_buffer_size 128k; proxy_connect_timeout 90; proxy_send_timeout 90; proxy_read_timeout 90; proxy_buffer_size 4k; proxy_buffers 4 32k; proxy_busy_buffers_size 64k; proxy_temp_file_write_size 64k; } location /test-app-media/ { root /sites/mysite/staticmedia/; expires max; } } but give a 502 bad gateway error, the path to /sites/mysite/staticmedia/ is in the nginx root/ is that the problem.. Django running on Apache 2.2 + mod_wsgi nginx 0.7.65 Thanks..

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Spatial Rotation in Gmod Expression2.

- by Fascia

I'm using expression2 to program behavior in Garry's mod (http://wiki.garrysmod.com/?title=Wire_Expression2) Okay so, to set the precedent. In Gmod I have a block and I am at a complete loss of how to get it to rotate around the 3 up, down and right vectors (Which are local. ie; if I pitch it 45 degrees the forward vector is 0.707, 0.707, 0). Essentially, From the 3 vectors I'd like to be able to get local Pitch/Roll/Yaw. By Local Pitch Roll Yaw I mean that they are completely independent of one another allowing true 3d rotation. So for example; if I place my craft so its nose is parallel to the floor the X,Y,Z would be 0,0,0. If I turn it parallel to the floor (World and Local Yaw) 90 degrees it's now 0, 0, 90. If I then pitch it (World Roll, Local Pitch) it 180 degrees it's now 180, 0, 90. I've already explored quaternions however I don't believe I should post my code here as I think I was re-inventing the wheel. I know I didn't explain that well but I believe the problem is pretty generic. Any help anyone could offer is greatly appreciated. Oh, I'd like to avoid gimblelock too. Essentially calculating the rotation around each of the crafts up/forward/right vectors using the up/forward/right vectors. To simply the question a generic implementation rather than one specific to Gmod is absolutely fine.

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Cocos2D: Problem Rotating a CCMenu

- by srikanth rongali

If I try to do actions over menuItems but the actions are not running as expected. I think code below should make the menuItem rotate by 90 degrees but when I run it, the menuItem translates from its coordinates to another coordinate then returns to its original coordinate. The complete translation takes 3 seconds. What I need is for the menuItem to rotate by 90 degrees in place within a 3 seconds duration. Please explain where I have done wrong? CCMenuItemImage *targetE;//Globally declared CCMenu *menu;//Globally declared -(id)init { if( (self = [super init]) ) { isTouchEnabled = YES; CGSize windowSize = [[CCDirector sharedDirector] winSize]; targetE = [CCMenuItemImage itemFromNormalImage:@"grossinis_sister1.png" selectedImage:@"grossinis_sister1.png" target:self selector:@selector(touch:)]; menu = [CCMenu menuWithItems:targetE,nil]; id action4 = [CCRotateBy actionWithDuration:3.0 angle:90]; [menu runAction: [CCSequence actions: action4, nil]]; menu.position = ccp(windowSize.width/2 + 200, windowSize.height/2); [self addChild: menu z:10]; } return self; } @end Thank You.

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