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• How Do I Know the Memory Used by Apps

  - by user176890

  Is it possible to know the memory used by any apps running on my linux server? I'm using the following command to know how much memory used by php-fpm. ps -ylC php5-fpm --sort:rss | awk '!/RSS/ { s+=$8 } END { printf "%s\n", "Total memory used by PHP-FPM child processes: "; printf "%dM\n", s/1024 }' Given the command above, I want to know the memory used by all apps with an example output below: PHP-FPM: 2.3gb MySQL: 5gb nginx: 200mb dovecot: 100mb memcached: 573mb

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• configure Squid3 proxy server on Ubuntu with caching and logging

  - by Panshul

  I have a ubuntu 11.10 machine. Installed Squid3. When i configure the squid as http_access allow all, everything works fine. my current configuration mostly default is as follows: 2012/09/10 13:19:57| Processing Configuration File: /etc/squid3/squid.conf (depth 0) 2012/09/10 13:19:57| Processing: acl manager proto cache_object 2012/09/10 13:19:57| Processing: acl localhost src 127.0.0.1/32 ::1 2012/09/10 13:19:57| Processing: acl to_localhost dst 127.0.0.0/8 0.0.0.0/32 ::1 2012/09/10 13:19:57| Processing: acl SSL_ports port 443 2012/09/10 13:19:57| Processing: acl Safe_ports port 80 # http 2012/09/10 13:19:57| Processing: acl Safe_ports port 21 # ftp 2012/09/10 13:19:57| Processing: acl Safe_ports port 443 # https 2012/09/10 13:19:57| Processing: acl Safe_ports port 70 # gopher 2012/09/10 13:19:57| Processing: acl Safe_ports port 210 # wais 2012/09/10 13:19:57| Processing: acl Safe_ports port 1025-65535 # unregistered ports 2012/09/10 13:19:57| Processing: acl Safe_ports port 280 # http-mgmt 2012/09/10 13:19:57| Processing: acl Safe_ports port 488 # gss-http 2012/09/10 13:19:57| Processing: acl Safe_ports port 591 # filemaker 2012/09/10 13:19:57| Processing: acl Safe_ports port 777 # multiling http 2012/09/10 13:19:57| Processing: acl CONNECT method CONNECT 2012/09/10 13:19:57| Processing: http_access allow manager localhost 2012/09/10 13:19:57| Processing: http_access deny manager 2012/09/10 13:19:57| Processing: http_access deny !Safe_ports 2012/09/10 13:19:57| Processing: http_access deny CONNECT !SSL_ports 2012/09/10 13:19:57| Processing: http_access allow localhost 2012/09/10 13:19:57| Processing: http_access deny all 2012/09/10 13:19:57| Processing: http_port 3128 2012/09/10 13:19:57| Processing: coredump_dir /var/spool/squid3 2012/09/10 13:19:57| Processing: refresh_pattern ^ftp: 1440 20% 10080 2012/09/10 13:19:57| Processing: refresh_pattern ^gopher: 1440 0% 1440 2012/09/10 13:19:57| Processing: refresh_pattern -i (/cgi-bin/|\?) 0 0% 0 2012/09/10 13:19:57| Processing: refresh_pattern (Release|Packages(.gz)*)$ 0 20% 2880 2012/09/10 13:19:57| Processing: refresh_pattern . 0 20% 4320 2012/09/10 13:19:57| Processing: http_access allow all 2012/09/10 13:19:57| Processing: cache_mem 512 MB 2012/09/10 13:19:57| Processing: logformat squid3 %ts.%03tu %6tr %>a %Ss/%03>Hs %<st %rm %ru 2012/09/10 13:19:57| Processing: access_log /home/panshul/squidCache/log/access.log squid3 The problem starts when I enable the following line: access_log /home/panshul/squidCache/log/access.log I start to get proxy server is refusing connections error in the browser. on commenting out the above line in my config, things go back to normal. The second problem starts when i add the following line to my config: cache_dir ufs /home/panshul/squidCache/cache 100 16 256 The squid server fails to start. Any suggestions what am I missing in the config. Please help.!!

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• Active directory integration not working properly with winbind and samba

  - by tubaguy50035

  I'm trying to get my linux box to use active directory authentication. I believe I have almost everything setup correctly. I'm able to issue wbinfo -g and wbinfo -u and see all the groups and users respectively. Brief intro to my setup: The username I use on my linux box to do admin things is nick. My active directory username is nwalke. They have two different passwords. I am able to log in to the box with nick and that user's password and I'm also able to login as nwalke with nwalke's password. The curious bit: Upon creating the active directory user's home directory, I run a script that requires root access. This is to setup some system wide things like a samba share for them. When I log in as nwalke, I enter my nwalke password and it succeeds. I'm then greeted with [sudo] password for nick:. If I enter my nwalke password here, it says Sorry, try again.. If I enter nick's password, it says Sorry, user nick is not allowed to execute scriptname as root. If I do groups as nwalke, I see that magically my user has been given the group nick. Now, I accidentally thought that nick had a UID of 100, not 1000. So originally in my smb.conf I had idmap uid 1000-10000. The only thing I can think of, is that I logged in with nwalke while that was still set and now I'm just being presented with a UID of 1000 forcing linux to think I'm nick. I'm not really sure where to go from here. Like I said, I'm fairly certain active directory is communicating with my server properly, but something must not be mapped right on the linux side. Any thoughts? Here is my smb.conf: [global] security = ads netbios name = hostname realm = COMPANY.COM password server = adshost.company.com workgroup = COMPANY idmap uid = 10000-90000 idmap gid = 10000-90000 winbind separator = + winbind enum users = no winbind enum groups = no winbind use default domain = yes template homedir = /home/%D/%U template shell = /bin/bash client use spnego = yes domain master = no load printers = no printing = bsd printcap name = /dev/null disable spoolss = yes Let me know if more information about something is required.

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• Site Isn't Enabled When Apache Restarted and No Error Message

  - by curiouscat

  I have added a new sites-available file but the site isn't enabled when apache is restarted. All the existing sites continue to work fine. There is no error message in /var/log/apache2/error.log There is the message, in the error log showing that I shut down the server and restarted: caught SIGTERM, shutting down There is nothing fancy about the site. The only special thing is the name is: domain_name.tv I can't imagine why that would matter, but at this point I can't imagine why the site isn't enabled or at least an error message given. Server running Ubuntu 12.04.

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• Order files in Ubuntu server in alpha order?

  - by Josh Sherick

  I have a PHP script that is for personal use that goes through a folder and lists all the pictures in the folder. The pictures are pages from a book, so it is important that they be in order. They are named so that in alphabetical order, they are also in the correct page order. I had it running on my Mac OS server, and it worked fine, listing them in order because Mac OS apparently keeps files alphabetically. Now, since I've switched to Ubuntu, it is listing them in a seemingly random order. Is there any way to order files in Ubuntu server so that they are in alphabetical order?

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• DNS Server Behind NAT

  - by Bryan

  I've got a Bind 9 DNS server sitting behind a NAT firewall, assume the Internet facing IP is 1.2.3.4 There are no restrictions on outgoing traffic, and port 53 (TCP/UDP) is forwarded from 1.2.3.4 to the internal DNS server (10.0.0.1). There are no IP Tables rules on either the VPS or the internal Bind 9 server. From a remote Linux VPS located elsewhere on the internet, nslookup works fine # nslookup foo.example.com 1.2.3.4 Server: 1.2.3.4 Address: 1.2.3.4#53 Name: foo.example.com Addresss: 9.9.9.9 However, when using the host command on the remote VPS, I receive the following output: # host foo.example.com 1.2.3.4 ;; reply from unexpected source: 1.2.3.4#13731, expected 1.2.3.4#53 ;; reply from unexpected source: 1.2.3.4#13731, expected 1.2.3.4#53 ;; connection timed out; no servers could be reached. From the VPS, I can establish a connection (using telnet) to 1.2.3.4:53 From the internal DNS server (10.0.0.1), the host command appears to be fine: # host foo.example.com 127.0.0.1 Using domain server: Name: 127.0.0.1 Address: 127.0.0.1#53 Aliases: foo.example.com has address 9.9.9.9 Any suggestions as to why the host command on my VPS is complaining about the reply coming back from another port, and what can I do to fix this? Further info: From a windows host external to the network >nslookup foo.example.com 1.2.3.4 DNS request timeout timeout was 2 seconds Server: UnKnown Address: 1.2.3.4 DNS request timed out. timeout was 2 seconds DNS request timed out. timeout was 2 seconds DNS request timed out. timeout was 2 seconds DNS request timed out. timeout was 2 seconds *** Request to UnKnown timed-out This is a default install of bind from Ubuntu 12.04 LTS, with around 11 zones configured. $ named -v BIND 9.8.1-P1 TCP Dump (filtered) from internal DNS server 20:36:29.175701 IP pc.external.com.57226 > dns.example.com.domain: 1+ PTR? 4.3.2.1.in-addr.arpa. (45) 20:36:29.175948 IP dns.example.com.domain > pc.external.com.57226: 1 Refused- 0/0/0 (45) 20:36:31.179786 IP pc.external.com.57227 > dns.example.com.domain: 2+[|domain] 20:36:31.179960 IP dns.example.com.domain > pc.external.com.57227: 2 Refused-[|domain] 20:36:33.180653 IP pc.external.com.57228 > dns.example.com.domain: 3+[|domain] 20:36:33.180906 IP dns.example.com.domain > pc.external.com.57228: 3 Refused-[|domain] 20:36:35.185182 IP pc.external.com.57229 > dns.example.com.domain: 4+ A? foo.example.com. (45) 20:36:35.185362 IP dns.example.com.domain > pc.external.com.57229: 4*- 1/1/1 (95) 20:36:37.182844 IP pc.external.com.57230 > dns.example.com.domain: 5+ AAAA? foo.example.com. (45) 20:36:37.182991 IP dns.example.com.domain > pc.external.com.57230: 5*- 0/1/0 (119) TCP Dump from client during query 21:24:52.054374 IP pc.external.com.43845 > dns.example.com.53: 6142+ A? foo.example.com. (45) 21:24:52.104694 IP dns.example.com.29242 > pc.external.com.43845: UDP, length 95

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• Why isn't "(ulimit -d 1000; firefox) &" working?

  - by MaxB

  I'm trying to limit the memory usage of firefox to prevent it from stalling the whole system with problematic web sites. I tried, in bash: (ulimit -d 1000; firefox) & This should limit the memory usage to 1000kB. Then I opened YouTube, and noticed, in top, that firefox is using 2.6% of the memory, or about 200MB, and not crashing. Clearly the limit is being ignored. Why is that, and how can I enforce it correctly?

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• Limit the amount of data that can be stored in a folder on Ubuntu Server 12.04?

  - by dougoftheabaci

  I'm in the process of building my first server. It's up, it's running, I'm transferring copious amounts of data away from my horrid little Drobo (DO NOT BUY ONE OF THESE, EVER). However, there's one thing I have yet to do: I'd like to set it up for Time Machine backups as well. I've seen all the guides and I have some idea of how to set the whole thing up, but the issue is that Time Machine will just fill up as much space as you let it. So if I let it lose in my 8 TB zpool it'll slowly consume every last available sector. This, of course, is not acceptable. I have a folder at the root of my zpool called "ZFS Time Machine" and I would like to limit it to 1 TB (all I need for backup purposes). However, I have no idea how to do that. Is this possible? I can continue using a small external hard drive attached via FW800 if I have to but I'd much rather prefer putting everything on my server.

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• Dual boot new laptop win 7 / ubuntu 12.04 - 750gb + 32gb SSD

  - by Alex Waters

  I have just purchased a new HP dv7t-7000 and I would like to run Windows 7 / Ubuntu. How do I setup the dual boot? Can I install both operating systems with an 8gb USB drive? Can I still make use of the 32gb SSD? I'm unfamiliar with the efficacy of using an SSD for caching with a 750gb 7200rpm sata 3 drive. I can only see using it for windows 7 - which I have installed in order to play games. Thank you!

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• Having troubles connectiong Magento to external Windows Database Server using Windows Azure

  - by Kevin H

  "I tried to make this easy to read through" I am using Ubuntu 12.04 LTS for Magento and installed these commands onto the system: sudo apt-get install apache2 sudo apt-get install php5 libapache2-mod-php5 sudo apt-get install php5-mysql sudo apt-get install php5-curl php5-mcrypt php5-gd php5-common sudo apt-get install php5-gd I used Windows Server 2008 R2 August 2012 for Mysql Server For a reference, I used http://www.windowsazure.com/en-us/manage/windows/common-tasks/install-mysql/ When the server was setup, I added an empty disk to it Then, I added endpoints 3306 Next I accessed the server remotely After that, I formatted the empty disk and was inserted as F: Next I downloaded Mysql from http://*.mysql.com version Windows (x86, 64-bit), MSI Installer 5.5.28 In the installation process, I used these settings: Typical Setup - Clicked Next, install, next Chose Detailed Configuration - Clicked next Chose Dedicated MySQL Server Machine - Clicked Next Chose Transactional Database Only - Clicked Next Chose the "F:" Drive - Clicked Next Chose Online Transactional Processing (OLTP) - Clicked Next For Networking Options, I checkmarked 'Enable TCP/IP Networking" 'Add firewall exception for this port' 'Enable Strict Mode' - Clicked Next Chose Standard Character Set - Clicked Next For Windows Options, I checkedmarked 'Install as Window Service" 'Launch the MySQL Server automatically' 'Include Bin Directory in Windows PATH - Clicked Next For Security Options, I checkmarked 'Modify Security Settings' and set root password - Clicked Next Finally clicked Execute and Finish These are the Firewall Setting that I set I clicked inbound rules Properties Scope Allow IP Address and used the internal Address for Magento Server Clicked Apply and exited Next, I opened up MySQL 5.x Command Line Client Entered Root Password Then entered these commands mysql create database magento; mysql Create user magentouser identified by 'password'; mysql Grant select, insert, create, alter, update, delete, lock tables on magento.* to magentouser mysql exit Finally, I opened up the Magento Downloader Magento validation has approved all PHP version is right. Your version is 5.3.10-1ubuntu3.4. PHP Extension curl is loaded PHP Extension dom is loaded PHP Extension gd is loaded PHP Extension hash is loaded PHP Extension iconv is loaded PHP Extension mcrypt is loaded PHP Extension pcre is loaded PHP Extension pdo is loaded PHP Extension pdo_mysql is loaded PHP Extension simplexml is loaded These are all installed on Magento Server For the Database Connection, I used: The Database server only has MySQL 5.5 Server installed on it Host - Internal IP address User Name - The User I created when setting up database Password - The Password I created when setting up database For the password, I did some research and found out that Magento only accepts alphanumeric, so I went and set it up again and used only alphanumeric for the User password Now, I am still getting Accessed denied for database Connection. Also, I have tryed to setup mysql on independant Linux Server but kept getting errors. When, I found the solution. Wouldn't work, so I decided to try Windows. These is the questions, I have been asking and researching to debug this issue Is it because I am using Linux for magento and Windows for Database. I have had no luck in finding a reason why this wouldn't work There must be something, I am missing I also researched the difference between linux sql databases and windows sql databases but have not come to conclusion, if installing Mysql on windows would make a difference in syntax and coding. I have spent a lot of time looking into this and need some help with direction on how to complete my project. Any type of help would be appreciated.

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• Installing Windows 8 over Windows 7 with Ubuntu installed using wubi (both on `C:\`)

  - by peat-ar

  Current state I'm using both - Ubuntu (installed via Wubi on the same drive as Windows) and Windows 7 - quite frequently. I just bought the upgrade to Windows 8 and was curious to try it out, however I'm quite insecure whether Windows 8's "secure boot" will exclude my current Ubuntu installation and if it's even possible to keep it. So... is there any way to upgrade to Windows 8 without overwriting Ubuntu? (I really don't want to reinstall it, as a lot of customization has been done here and taking backups and all would get pretty wearing (same case for Windows 7 - if possible, I'd like to keep my files)) This is not a dublicate of Installing Windows 8 over Windows 7 with Ubuntu installed using wubi? because this question only deals with the case when Ubuntu has been installed on (e.g.) D:\ (while Windows is being installed on C:\)

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• warning: dict_ldap_lookup: Search error 1: Operations error

  - by drecute

  Please I need help with ldap search filter to use to retrieve the user email information from ldap. I'm running postfix_ldap of Ubuntu server 12.04. Everything seems to work fine, except getting the values returned from the search. Version 1 server_host = ldap://samba.example.com search_base = dc=company, dc=example, dc=com query_filter = mail=%s bind = no domain = example.com Version 2 server_host = ldap://samba.example.com search_base = dc=company, dc=example, dc=com query_filter = mail=%s bind_dn = cn=Users,dc=company,dc=example,dc=com domain = example.com mail logs Nov 26 11:13:26 mail postfix/smtpd[19662]: match_string: example.com ~? example.com Nov 26 11:13:26 mail postfix/smtpd[19662]: dict_ldap_lookup: No existing connection for LDAP source /etc/postfix/ldap-aliases.cf, reopening Nov 26 11:13:26 mail postfix/smtpd[19662]: dict_ldap_connect: Connecting to server ldap://samba.example.com Nov 26 11:13:26 mail postfix/smtpd[19662]: dict_ldap_connect: Actual Protocol version used is 3. Nov 26 11:13:26 mail postfix/smtpd[19662]: dict_ldap_connect: Binding to server ldap://samba.example.com with dn cn=Users,dc=company,dc=example,dc=com Nov 26 11:13:26 mail postfix/smtpd[19662]: warning: dict_ldap_connect: Unable to bind to server ldap://samba.example.com with dn cn=Users,dc=company,dc=example,dc=com: 49 (Invalid credentials) Nov 26 11:13:26 mail postfix/smtpd[19662]: warning: ldap:/etc/postfix/ldap-aliases.cf lookup error for "[email protected]" Nov 26 11:13:26 mail postfix/smtpd[19662]: maps_find: virtual_alias_maps: [email protected]: search aborted Nov 26 11:13:26 mail postfix/smtpd[19662]: mail_addr_find: [email protected] -> (try again) Nov 26 11:13:26 mail postfix/smtpd[19662]: NOQUEUE: reject: RCPT from col0-omc3-s2.col0.hotmail.com[65.55.34.140]: 451 4.3.0 <[email protected]>: Temporary lookup failure; from=<[email protected]> to=<[email protected]> proto=ESMTP helo=<col0-omc3-s2.col0.hotmail.com> Nov 26 11:13:26 mail postfix/smtpd[19662]: > col0-omc3-s2.col0.hotmail.com[65.55.34.140]: 451 4.3.0 <[email protected]>: Temporary lookup failure here's another log with successful search result but fialed to get the values of the result Nov 26 12:04:56 mail postfix/smtpd[20463]: dict_ldap_lookup: Using existing connection for LDAP source /etc/postfix/ldap-aliases.cf Nov 26 12:04:56 mail postfix/smtpd[20463]: dict_ldap_lookup: /etc/postfix/ldap-aliases.cf: Searching with filter [email protected] Nov 26 12:04:56 mail postfix/smtpd[20463]: dict_ldap_get_values[1]: Search found 1 match(es) Nov 26 12:04:56 mail postfix/smtpd[20463]: dict_ldap_get_values[1]: Leaving dict_ldap_get_values Nov 26 12:04:56 mail postfix/smtpd[20463]: dict_ldap_lookup: Search returned nothing Nov 26 12:04:56 mail postfix/smtpd[20463]: maps_find: virtual_alias_maps: [email protected]: not found Nov 26 12:04:56 mail postfix/smtpd[20463]: dict_ldap_lookup: In dict_ldap_lookup Nov 26 12:04:56 mail postfix/smtpd[20463]: dict_ldap_lookup: /etc/postfix/ldap-aliases.cf: Skipping lookup of key 'tola.akintola': domain mismatch Nov 26 12:04:56 mail postfix/smtpd[20463]: maps_find: virtual_alias_maps: tola.akintola: not found Nov 26 12:04:56 mail postfix/smtpd[20463]: dict_ldap_lookup: In dict_ldap_lookup Nov 26 12:04:56 mail postfix/smtpd[20463]: dict_ldap_lookup: /etc/postfix/ldap-aliases.cf: Skipping lookup of key '@example.com': domain mismatch Nov 26 12:04:56 mail postfix/smtpd[20463]: maps_find: virtual_alias_maps: @example.com: not found Nov 26 12:04:56 mail postfix/smtpd[20463]: mail_addr_find: [email protected] -> (not found) My refined ldap-aliases.cf looks like this: server_host = ldap://samba.example.com server_port = 3268 search_base = dc=company, dc=example, dc=com query_filter = mail=%s result_attribute = uid bind_dn = cn=Administrator,cn=Users,dc=company,dc=example,dc=com bind_pw = pass domain = example.com So I'll like to know what ldap filter is appropriate to get this to work. Thanks for helping out.

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• Simple jail for user with open-ssh

  - by Vikram

  Can I confine my users to their /home/%u directory using simply open-ssh configuration? I did the following from what I found on the Internet Stopped the server To the sshd_config file appended the following Match group sftpusers ChrootDirectory /home/%u X11Forwarding no AllowTcpForwarding no started the server FYI I have the users added to sftpusers group My users can still access entire file structure on my system Ubuntu Server 12.04 LTS with open-ssh installed

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• PHP-FPM chroot mail issues

  - by tubaguy50035

  I'm trying to chroot a site using PHP-FPM. I've been following this post and have done mount --bind for all of those files and folders. When I try to send mail using mail(), it returns false. PHP does have access to usr/sbin/sendmail (which is what my sendmail path is set to in the php.ini), along with the other files mentioned in that post, within the chroot. Anybody have any clues as to what files I'm missing or how to debug further?

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• Ubuntu 12.04 - HP ProLiant DL380 G4 - Load Maxes Out / Unresponsive

  - by Brian S

  Trying to post this question on here. I've posted it on the Ubuntu forums as well with no replies. Recently I upgraded an HP ProLiant DL380 G4 server from Ubuntu 10.04 server to Ubuntu 12.04 server. Upon doing so, the server will not - at random times - get to a load of 400+ and then become completely non-responsive. I use an SNMP graphing program (cacti) and the load steadily increases by about 10 every five minutes until it gets over 400 and the graphing stops. The graphs may not be accurate, but the CPU load averages about 3% before this happens - and right when the load starts increasing, it jumps to about 25% for 15 minutes and dramatically dips down to less than 1% (about 0.3%) until the graphing stops. I'm not able to open a SSH tunnel to the server to do anything. I've checked the /var/log/syslog and all logging stops at that time as well - with nothing else in there. The odd thing is - the server still responds to DNS queries for the zones it is authoritative on during this time - and at normal speed. Just not sure what the next step would be in order to find out what is going on - and how this issue can be corrected. The server cannot stay with Ubuntu 10.04 Server and needs to stay upgraded.

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• Mount /tmp in /mnt on EC2

  - by Claudio Poli

  I was wondering what is the best way to mount the /tmp endpoint in the ephemeral storage /mnt on an EC2 instance and give the ubuntu user default write permissions. Some suggest editing /etc/rc.local this way: mkdir -p /mnt/tmp && mount --bind -o nobootwait /mnt/tmp /tmp However that doesn't work for me. I tried editing the fstab: /dev/xvdb /tmp auto defaults,nobootwait,comment=cloudconfig 0 2 and giving it a umask=0777, however it doesn't work because of cloudconfig. I'm using Ubuntu 12.04.

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• HAProxy causing delay

  - by user1221444

  I am trying to configure HAProxy to do load balancing for a custom webserver I created. Right now I am noticing an increasing delay with HAProxy as the size of the return message increases. For example, I ran four different tests, here are the results: Response 15kb through HAProxy: Avg. response time: .34 secs Transacation rate: 763 trans/sec Throughput: 11.08 MB/sec Response 2kb through HAProxy: Avg. response time: .08 secs Transaction rate: 1171 trans / sec Throughput: 2.51 MB/sec Response 15kb directly to server: Avg. response time: .11 sec Transaction rate: 1046 trans/sec throughput: 15.20 MB/sec Response 2kb directly to server: Avg. Response time: .05 secs Transaction rate: 1158 trans/sec Throughput: 2.48 MB/sec All transactions are HTTP requests. As you can see, there seems to be a much bigger difference between response times for when the response is bigger, than when it is smaller. I understand there will be a slight delay when using HAProxy. Not sure if it matters, but the test itself was run using siege. And during the test there was only one server behind the HAProxy(the same that was used in the direct to server tests). Here is my haproxy.config file: global log 127.0.0.1 local0 log 127.0.0.1 local1 notice maxconn 10000 user haproxy group haproxy daemon #debug defaults log global mode http option httplog option dontlognull retries 3 option redispatch option httpclose maxconn 10000 contimeout 10000 clitimeout 50000 srvtimeout 50000 balance roundrobin stats enable stats uri /stats listen lb1 10.1.10.26:80 maxconn 10000 server app1 10.1.10.200:8080 maxconn 5000 I couldn't find much in terms of options in this file that would help my problem. I have heard suggestions that I may have to adjust a few of my sysctl settings. I could not find a lot of information on this however, most documentation is for Linux 2.4 and 2.6 on the sysctl stuff, I am running 3.2(Ubuntu server 12.04), which seems to auto tuning, so I have no clue what I should or shouldn't be changing. Most settings changes I tried had no effect or a negative effect on performance. Just a notice, this is a very preliminary test, and my hope is that at deployment time, my HAProxy will be able to balance 10k-20k requests/sec to many servers, so if anyone could provide information to help me reach that goal, it would be much appreciated. Thank you very much for any information you can provide. And if you need anymore information from me please let me know, I will get you anything I can.

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• PureFTPd : ChrootEveryone not working

  - by Mistha Noobstha

  I have a fresh install of Ubuntu 12.04 with pure-ftpd version 1.0.35-1. I don't use database for the only user I have (ftpuser1 - localuser), but I want to lock him into his home directory. /ftp/ftpuser1 is the home dir of ftpuser1. /etc/pure-ftpd/conf/ChrootEveryone has the yes string and in /etc/default/pure-ftpd-common VIRTUALCHROOT is set to false, but ftpuser1 can freely walk around. My startup line for pure-ftpd looks like this : /usr/sbin/pure-ftpd -l pam -A -8 UTF-8 -O clf:/var/log/pure-ftpd/transfer.log -u 1000 -E -B So there is the "-A" in it for the ChrootEveryone.

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• Intel NIC X540-T1 non-functional in Ubuntu Server 12.04

  - by Jeff Carr

  I have installed three Intel X540-T1's in servers running Ubuntu Server 12.04, but all are non-functional, no link lights, no packets sent or received, and no connection on ip4 or ip6 whether set up as dhcp or static. Also, dmesg doesn't detect cable connection or disconnection. I updated the default ixgbe driver to Intel's latest version (3.11.33) with no change. The ethernet controller is being reported as X540-AT2 (which might be a problem that I can't figure out how to fix), but the subsystem is X540-T1 so I believe that might be intended. Does anyone have any experience with this that could assist? ifconfig eth2 eth2 Link encap:Ethernet HWaddr a0:36:9f:14:5f:ea inet addr:192.168.101.1 Bcast:192.168.101.255 Mask:255.255.255.0 UP BROADCAST MULTICAST MTU:1500 Metric:1<br> RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B) ethtool -i eth2 driver: ixgbe version: 3.11.33 firmware-version: 0x8000037c bus-info: 0000:08:00.0 supports-statistics: yes supports-test: yes supports-eeprom-access: yes supports-register-dump: yes lspci -vvnns 08:00.0 08:00.0 Ethernet controller [0200]: Intel Corporation Ethernet Controller 10 Gigabit X540-AT2 [8086:1528] (rev 01) Subsystem: Intel Corporation Ethernet Converged Network Adapter X540-T1 [8086:0002] Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr+ Stepping- SERR+ FastB2B- DisINTx+ Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Latency: 0, Cache Line Size: 32 bytes Interrupt: pin A routed to IRQ 16 Region 0: Memory at e8000000 (64-bit, prefetchable) [size=2M] Region 4: Memory at e8200000 (64-bit, prefetchable) [size=16K] [virtual] Expansion ROM at e8280000 [disabled] [size=512K] Capabilities: <access denied> Kernel driver in use: ixgbe Kernel modules: ixgbe

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• Set up proxy for vpn server on ubuntu server 12.4

  - by Morteza Soltanabadiyan

  I have a vpn server with HTTPS, L2TP, OPENVPN, and PPTP. I want to set up a proxy on the server, so all connection that comes from vpn clients, they will use that. I created the following bash script file for it, but the proxy isn't working. gsettings set org.gnome.system.proxy mode 'manual' gsettings set org.gnome.system.proxy.http enabled true gsettings set org.gnome.system.proxy.http host 'cproxy.anadolu.edu.tr' gsettings set org.gnome.system.proxy.http port 8080 gsettings set org.gnome.system.proxy.http authentication-user 'admin' gsettings set org.gnome.system.proxy.http authentication-password 'admin' gsettings set org.gnome.system.proxy use-same-proxy true export http_proxy=http://admin:[email protected]:8080 export https_proxy=http://admin:[email protected]:8080 export HTTP_PROXY=http://admin:[email protected]:8080 export HTTPS_PROXY=http://admin:[email protected]:8080 What to do to make a global proxy for server and all vpn clients to use it automatically?

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• The simplest Ubuntu mail server

  - by John G.

  After days of trying all sorts of tutorials I finally found a simple solution (not necessary the best) for a functional ubuntu mail server: sudo aptitude install postfix next type sudo dpkg-reconfigure postfix and configure like this: Internet Site yourdomain.com john (type your ubuntu user) yourdomain.com, localhost.localdomain, localhost No 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/192.168.0.1/24 (192.198.0.1 replace with your server ip address) 0 + all next install mail-stack-delivery sudo aptitude install mail-stack-delivery At this point you have a working mail server. Next, I configured SquirrelMail and start sending and receaving mail. This configuration worked with both Apache and Nginx.

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• set proxy for vpn server on ubuntu server 12.4

  - by Morteza Soltanabadiyan

  I have a vpn server with HTTPS, L2TP , OPENVPN , PPTP. i want to set proxy in the server so all connection that comes from vpn clients use the proxy that i set in my server. I made a bash script file for it , but proxy not working. gsettings set org.gnome.system.proxy mode 'manual' gsettings set org.gnome.system.proxy.http enabled true gsettings set org.gnome.system.proxy.http host 'cproxy.anadolu.edu.tr' gsettings set org.gnome.system.proxy.http port 8080 gsettings set org.gnome.system.proxy.http authentication-user 'admin' gsettings set org.gnome.system.proxy.http authentication-password 'admin' gsettings set org.gnome.system.proxy use-same-proxy true export http_proxy=http://admin:[email protected]:8080 export https_proxy=http://admin:[email protected]:8080 export HTTP_PROXY=http://admin:[email protected]:8080 export HTTPS_PROXY=http://admin:[email protected]:8080 Now , i dont know what to do to make a global proxy for server and all vpn clients use it automatically.

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• SSH broken after homedir permissions and hostname change on EC2-hosted Ubuntu

  - by dimadima

  I changed my instance's hostname using the hostname utility and then set it in /etc/hostname so that the new name survives reboot. My main motivation was for differentiating between instances at the prompt using the \h format in PS1. EDIT I also changed permissions on my home directory. I made my home directory group writeable. Now I can no longer SSH into the machine. The short of it is the error Permission denied (publickey). Running ssh -v, the more verbose output is: debug1: Authentications that can continue: publickey debug1: Next authentication method: publickey debug1: Offering RSA public key: /Users/dmitry/.ssh/id_rsa debug1: Authentications that can continue: publickey debug1: Trying private key: /Users/dmitry/.ssh/ec2key.pem debug1: read PEM private key done: type RSA debug1: Authentications that can continue: publickey debug1: No more authentication methods to try. Permission denied (publickey). Should I have done something after changing the hostname? Now I can't get into the instance! :(

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• getaddrinfo: command not found

  - by jebbie

  I've installed a new Ubuntu 12.04 on an AWS EC2 instance and everything worked fine till now. I followed the instructions in this great tutorial: http://www.exratione.com/2012/05/a-mailserver-on-ubuntu-1204-postfix-dovecot-mysql/ Now i'm on the point "installing monit" and when i restart the service i get this error message now: monit: Cannot translate '(none)' to FQDN name -- Name or service not known I started googling and someone is writing there, that monit uses getaddrinfo in his startup-process to determine the hostname. Ok, so i thought i try out on myself what is getaddrinfo delivering, and then i got: getaddrinfo: command not found I guess, something is missing on my system. Can anyone help?

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• Ubuntu upgrade process failed

  - by Spin0us

  I tried to dist-upgrade my ubuntu server on my percona cluster but it failed with this message The following packages have unmet dependencies: libmysqlclient18 : Depends: libmariadbclient18 (= 5.5.33a+maria-1~precise) but it is not installable And here is the package listing # dpkg --list | grep -E 'percona|mysql' ii libdbd-mysql-perl 4.020-1build2 Perl5 database interface to the MySQL database iU libmysqlclient18 5.5.33a+maria-1~precise Virtual package to satisfy external depends ii mariadb-common 5.5.33a+maria-1~precise MariaDB database common files (e.g. /etc/mysql/conf.d/mariadb.cnf) ii percona-xtrabackup 2.1.5-680-1.precise Open source backup tool for InnoDB and XtraDB ii percona-xtradb-cluster-client-5.5 5.5.31-23.7.5-438.precise Percona Server database client binaries ii percona-xtradb-cluster-common-5.5 5.5.33-23.7.6-496.precise Percona Server database common files (e.g. /etc/mysql/my.cnf) ii percona-xtradb-cluster-galera-2.x 157.precise Galera components of Percona XtraDB Cluster ii percona-xtradb-cluster-server-5.5 5.5.31-23.7.5-438.precise Percona Server database server binaries ii php5-mysql 5.3.10-1ubuntu3.8 MySQL module for php5 During the install of the server, mariadb and galera cluster have first been installed. Then removed to be replaced by percona XtraDBCluster. So i think this is the source of the problem. But how can i resolve this without reinstalling all ? UPDATE 1 # apt-cache policy libmariadbclient18 libmariadbclient18: Installed: (none) Candidate: (none) Version table: 5.5.32+maria-1~precise 0 100 /var/lib/dpkg/status

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