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• Port forwarding + shared connection with Ubuntu

  - by Joey Adams

  Because my wireless router's ethernet ports are defective, I set up a shared wireless connection from my laptop (which has wifi) to my eMac (which does not) via a crossover ethernet cable. The laptop is behind a router as 192.168.1.131, and the eMac is behind the laptop as 10.42.43.1 . The laptop is running Ubuntu 9.10 (Karmic). I achieved the shared connection through NetworkManager Applet. I right-clicked on the network icon at the topright, went to Edit Connections, selected the Wired connection named "Auto eth0", clicked "Edit...", went to the "IPv4 Settings" tab, and selected the Method "Shared to other computers". The eMac can now access the Internet. Now I want to enable port forwarding. There's a game I want to play that needs port 6112 forwarded (both TCP and UDP) in order to host games. I set up the router to enable port forwarding for 192.168.1.131 (the laptop), but port forwarding still isn't available on the eMac. I suppose I need to pretend my laptop is a router and configure port forwarding on it, indicating that incoming connections to the laptop (192.168.1.131) should be forwarded to the eMac on the shared connection (10.42.43.1 ). Thus, packets coming into the router on port 6112 would be redirected to the laptop (by the router), then to the eMac (by the laptop). My question is, how would I do that on Ubuntu (in light of NetworkManager's presence)? Also, if I can't get this to work, does anyone mind hosting a comp stomp? :D

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• Cygwin, ssh, and git on Windows Server 2008

  - by Paul

  Hi everyone. I'm trying to setup a git repository on an existing Windows 2008 (R2) server. I have successfully installed Cygwin & added git and ssh to the packages, and everything works perfectly (thanks to Mark for his article on it). I can ssh to localhost on the server, and I can do git operations locally on the server. When I try to do either from the client, however, I get the "port 22, Bad file number" error. Detailed SSH output is limited to this: OpenSSH_4.6p1, OpenSSL 0.9.8e 23 Feb 2007 debug1: Connecting to {myserver} [{myserver}] port 22. debug1: connect to address {myserver} port 22: Attempt to connect timed out without establishing a connection ssh: connect to host {myserver} port 22: Bad file number Google tells me that this means I'm being blocked, usually, by a firewall. So, double-checked the firewall settings on the server, rule is there allowing port 22 traffic. I even tried turning off the firewall briefly, no change in behavior. I can ssh just fine from that client to other servers. The hosting company swears that there's no other firewalls blocking that server on port 22 (or any other port, they claim, but I find that hard to believe). I have another trouble ticket into them, just in case the first support person was full of it, but meanwhile I wanted to see if anyone could think of anything else it can be. Thanks, Paul

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• Solaris 10 invalid ARP requests from 0.0.0.0?

  - by JWD

  The guys at the data center where I'm hosting a server running Solaris 10 are telling me that my server is making a lot of invalid arp requests. This is an example of a portion of what was sent to me from the logs (with Mac addresses and IP addresses changed). xxxx:xxxx:xxxx/0.0.0.0/0000.0000.0000/[myipaddress]/[Datestamp]) I don't see anything in the arp tables (arp -a) or routing tables (netstat -r) and I don't see anything relating to 0.0.0.0 when snoping the arp requests. The only place I see any reference to 0.0.0.0 is if I do netstat -a for the SCTP SCTP: Local Address Remote Address Swind Send-Q Rwind Recv-Q StrsI/O State ------------------------------- ------------------------------- ------ ------ ------ ------ ------- ----------- 0.0.0.0 0.0.0.0 0 0 102400 0 32/32 CLOSED But not really sure what that means. Doesn't seem like I can disable SCTP. Does anyone have any idea what might be causing this and how to stop it? I think the switch I'm connected to doesn't like it and momentarily drops the connection. Is there anyway to at least block those requests using ipfilter or something else?

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• Has anyone used the sharedband connection bonding product?

  - by John Rennie

  See http://www.sharedband.com/ for details on the product. Obviously Sharedband aren't too keen on giving away their technical secrets, but I would guess that it bonds the connections at the IP layer i.e. their routers send the IP packets to the SharedBand routers over all available lines and the ShareBand routers handle all the virtual circuitry and provide the NATing to whatever IP address(es) they've assigned you. It looks a clever idea, and a good way to provide some resilience over ADSL links. You can even use ADSL links from different ISPs and SharedBand will still bond them for you. But, I find myself wondering how well it really works, and whether it's worth it. The Draytek routers can already load balance (though not bond) up to four ADSL lines, so the SharedBand product really only offers an advantage if you're hosting servers i.e. you can have one IP address to accept incoming connections through all your (working) ADSL lines. But should you really try and host servers using ADSL lines, especially since ADSL upload performance isn't stellar? Wouldn't it be better to use a hosted server, or maybe pay up for a leased line with a SLA? So I'm asking if anyone is using SharedBand, and if so what do you think of it? JR

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• Short POST data in HTTP

  - by Matt

  We're hosting a customer's Debian Linux web server. It's running a PHP based web application. The server is sitting behind our firewall with it's own virtual interface and port 80 is forwarded internally to a machine sitting in the DMZ. The issue we're having is that when data is posted to the server it seems to be being cut short for some users. It's reproducable for some users on the same box. But the same user sending the same data on the same lan on another PC it works. The data gets cut to around 1140 bytes I'm told. Any idea why this might be happening? The customer is blaming our firewall, but then surely we'd have issues with other services. I'm suspecting it's a problem with the website itself. Suggestions on how to isolate the problem would be of help. Our firewall is Astaro. EDIT: A customer has set the ethernet frame size temporarily to 500bytes on the server. This made it work for now! I know some of the customers are using an internet provider that runs PPPoE

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• How do you add a domain name to a VPS?

  - by jasonaburton

  Hi all, I have a VPS with allgamer.net (I use it to play minecraft). I also have a domain name with networksolutions.com What I want to do is attach that domain name to the VPS. I want to run a wiki on my domain name. If this is possible I can avoid buying another hosting plan just for the wiki. How do I go about doing this? I have very little knowledge in server administration so any advice you guys have is greatly appreciated! I'm pretty sure I have to change the DNS in my domain name to the DNS for my VPS, but on allgamer.net's interface there is no discernable place to find out what I need to change it to. Is there a way to find out the DNS via SSH on my VPS? As well, when I first got my VPS with allgamer.net I filled out a form for it with all my information, but they also wanted a domain name along with it. I gave them the domain name I currently own, but for some reason, it's like it's not connected to the VPS, like if I go to mydomain.com there's nothing, as well, if I use mydomain.com for my minecraft server, it also doesn't work. It's as if it's serving no purpose by being "attached" to my VPS. Any insights into this? Thanks for any help you guys can give me.

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• Chroot jail of Nginx and php

  - by sqren

  I'm hosting multiple websites on one VPS, and want to chroot each website, eg. /chroot/website1 /chroot/website2 I'm using makejail, which is a highlevel tool, for creating the jails, and copying the libraries and dependencies. Easy peasy. Each website will need nginx, php and mysql. For php I'm using php5-fpm which actually supports chroot by configuration, however I'm not using this (maybe I should?) My question is which approach of the following three is the better: 1) Every website will have its own seperated instance of nginx, php and mysql. The downside is, that each webserver + php has to listen to a different port. I also need a "master" nginx web server in front of them, reverse proxying to the chrooted servers behind it. Probably most secure, but also most advanced. 2) I don't make any chroot jails manually. I setup one nginx web server, that proxies php requests to php-fpm, on different ports. I can have multiple php-fpm configurations each with is own chroot'ed folder. This is quite managable - however only php will be chrooted. Not the actual webserver. Is this secure enough. Also, I tried this option out, and it seems I will need to use TCP instead of sockets for connecting to MySQL. 3) You tell me ;) I'm quite new to chroot jailing, so please correct me if I'm wrong in my assumptions. I've been reading all the tutorials I could find, however, I find the market for chroot guides very scarce. Any help or inputs much appreciated!

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• Blocking requests from specific IPs using IIS Rewrite module

  - by Thomas Levesque

  I'm trying to block a range of IP that is sending tons of spam to my blog. I can't use the solution described here because it's a shared hosting and I can't change anything to the server configuration. I only have access to a few options in Remote IIS. I see that the URL Rewrite module has an option to block requests, so I tried to use it. My rule is as follows in web.config: <rule name="BlockSpam" enabled="true" stopProcessing="true"> <match url=".*" /> <conditions logicalGrouping="MatchAll" trackAllCaptures="false"> <add input="{REMOTE_ADDR}" pattern="10\.0\.146\.23[0-9]" ignoreCase="false" /> </conditions> <action type="CustomResponse" statusCode="403" /> </rule> Unfortunately, if I put it at the end of the rewrite rules, it doesn't seem to block anything... and if I put it at the start of the list, it blocks everything! It looks like the condition isn't taken into account. In the UI, the stopProcessing option is not visible and is true by default. Changing it to false in web.config doesn't seem to have any effect. I'm not sure what to do now... any ideas?

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• SQL Server Issue: Could not allocate space for object ... primary filegroup is full

  - by Luke

  Trying to figure out a problem at an office that has SQL Server 2005 installed on Windows SBS Server 2008. Here's the setup: It's an office, and the person who set this all up is nowhere to be found. I'm the best hope they have... One of the programs they use on a workstation gives them an error of "Could not allocate space for object 'Billing' in database "MyDatabase" because primary filegroup is full" when trying to save an entry in their software. I searched around for hours, looking for possible solutions. One was to check for available disk space, and another was to defrag. I checked the hard drives on the server, and there is plenty of space free. I also defragged, which may have helped the problem somewhat. It's hard to say, because it seems like with the nature of the error, if you try over and over you might get it to actually save. My next step was to try to see if autogrowth was enabled on the database. This would seem to be a likely / possible solution, but I can't access the database! If I run the SQL Management Studio, I can log in as my Windows user and view the list of databases. However, if I try to do anything (actually view the database, view the properties, add or edit users), I get errors that I don't have permission. For what it's worth, I also tried runing Management Studio as Administrator, in case that would help. No difference, though. Now, what I'm guessing is going on -- from my limited knowledge of SQL and from reading online -- is that though I'm logged in as a Windows administrator, that account does NOT have SQL access. I do see a list of SQL users, including SA, but I again don't have permission to add one or to change the password on an existing one. And nobody at the office has any idea what the SQL passwords could be. So... here's my thinking thus far: 1 - The "Could not allocate" error likely points to a database that needs to be allowed to autogrow. Especially since I verified there is plenty of free space and the HD has been defragmented. 2 - Enabling autogrow would be very easy to do if I had the proper access within SQL Management Stuido. That leads me to this link: http://blogs.technet.com/b/sqlman/archive/2011/06/14/tips-amp-tricks-you-have-lost-access-to-sql-server-now-what.aspx It sounds like it's a step-by-step guide for giving me the access I need to SQL. I'm guessing that if I followed this guide, I would be able to then log in to the SQL server via Management Studio with the proper permissions, and would be able to enable autogrow (or simply view the status of the existing database), and hopefully solve the "Could not allocate space" problem! So I guess I have a few questions: 1 - Would you guys agree with my "diagnosis"? Think I'm barking up the right tree? 2 - Is there any risk at all in hurting / disabling / wrecking the current SQL database or setup with me going through the guide to regain SQL access? I understand that per the guide, I would have to temporarily shut down SQL, so obviously it wouldn't be accessible during that time. But it wouldn't be worth the risk if there's a chance I could mess anything up... Like I said, the workstations ARE currently accessing the database somehow, but nobody knows with what login info or anything. Basically, it's set up, it works (usually), but if they had to reload the software, nobody would know how. Any feedback would be appreciated!! The problem is such that it's not an emergency for them, but an annoyance. If I could fix it, it would be wonderful. But if not, I think they'll manage, especially as they are going to eventually stop using this software. Thank you so much for your time! Luke

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• Nginx + PHP-FPM = "Random" 502 Bad Gateway

  - by david

  I am running Nginx and proxying php requests via FastCGI to PHP-FPM for processing. I will randomly receive 502 Bad Gateway error pages - I can reproduce this issue by clicking around my PHP websites very rapidly/refreshing a page for a minute or two. When I get the 502 error page all I have to do is refresh the browser and the page refreshes properly. Here is my setup: nginx/0.7.64 PHP 5.3.2 (fpm-fcgi) (built: Apr 1 2010 06:42:04) Ubuntu 9.10 (Latest 2.6 Paravirt) I compiled PHP-FPM using this ./configure directive ./configure --enable-fpm --sysconfdir=/etc/php5/conf.d --with-config-file-path=/etc/php5/conf.d/php.ini --with-zlib --with-openssl --enable-zip --enable-exif --enable-ftp --enable-mbstring --enable-mbregex --enable-soap --enable-sockets --disable-cgi --with-curl --with-curlwrappers --with-gd --with-mcrypt --enable-memcache --with-mhash --with-jpeg-dir=/usr/local/lib --with-mysql=/usr/bin/mysql --with-mysqli=/usr/bin/mysql_config --enable-pdo --with-pdo-mysql=/usr/bin/mysql --with-pdo-sqlite --with-pspell --with-snmp --with-sqlite --with-tidy --with-xmlrpc --with-xsl My php-fpm.conf looks like this (the relevant parts): ... <value name="pm"> <value name="max_children">3</value> ... <value name="request_terminate_timeout">60s</value> <value name="request_slowlog_timeout">30s</value> <value name="slowlog">/var/log/php-fpm.log.slow</value> <value name="rlimit_files">1024</value> <value name="rlimit_core">0</value> <value name="chroot"></value> <value name="chdir"></value> <value name="catch_workers_output">yes</value> <value name="max_requests">500</value> ... I've tried increasing the max_children to 10 and it makes no difference. I've also tried setting it to 'dynamic' and setting max_children to 50, and start_server to '5' without any difference. I have tried using both 1 and 5 nginx worker processes. My fastcgi_params conf looks like: fastcgi_connect_timeout 60; fastcgi_send_timeout 180; fastcgi_read_timeout 180; fastcgi_buffer_size 128k; fastcgi_buffers 4 256k; fastcgi_busy_buffers_size 256k; fastcgi_temp_file_write_size 256k; fastcgi_intercept_errors on; fastcgi_param QUERY_STRING $query_string; fastcgi_param REQUEST_METHOD $request_method; fastcgi_param CONTENT_TYPE $content_type; fastcgi_param CONTENT_LENGTH $content_length; fastcgi_param SCRIPT_NAME $fastcgi_script_name; fastcgi_param REQUEST_URI $request_uri; fastcgi_param DOCUMENT_URI $document_uri; fastcgi_param DOCUMENT_ROOT $document_root; fastcgi_param SERVER_PROTOCOL $server_protocol; fastcgi_param GATEWAY_INTERFACE CGI/1.1; fastcgi_param SERVER_SOFTWARE nginx/$nginx_version; fastcgi_param REMOTE_ADDR $remote_addr; fastcgi_param REMOTE_PORT $remote_port; fastcgi_param SERVER_ADDR $server_addr; fastcgi_param SERVER_PORT $server_port; fastcgi_param SERVER_NAME $server_name; fastcgi_param REDIRECT_STATUS 200; Nginx logs the error as: [error] 3947#0: *10530 connect() failed (111: Connection refused) while connecting to upstream, client: 68.40.xxx.xxx, server: www.domain.com, request: "GET /favicon.ico HTTP/1.1", upstream: "fastcgi://127.0.0.1:9000", host: "www.domain.com" PHP-FPM logs the follow at the time of the error: [NOTICE] pid 17161, fpm_unix_init_main(), line 255: getrlimit(nofile): max:1024, cur:1024 [NOTICE] pid 17161, fpm_event_init_main(), line 93: libevent: using epoll [NOTICE] pid 17161, fpm_init(), line 50: fpm is running, pid 17161 [DEBUG] pid 17161, fpm_children_make(), line 403: [pool default] child 17162 started [DEBUG] pid 17161, fpm_children_make(), line 403: [pool default] child 17163 started [DEBUG] pid 17161, fpm_children_make(), line 403: [pool default] child 17164 started [NOTICE] pid 17161, fpm_event_loop(), line 111: ready to handle connections My CPU usage maxes out around 10-15% when I recreate the issue. My Free mem (free -m) is 130MB I had this intermittent 502 Bad Gateway issue when in was using php5-cgi to service my php requests as well. Does anyone know how to fix this?

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• Plesk wildcard subdomain not working

  - by avdgaag

  I'm trying to set up a wildcard subdomain on my VPS. Ultimately I want to end up with this: main site: my.domain.tld subdomain: sub1.my.domain.tld - should end up serving my.domain.tld/sub1 I am using plesk 8.6. I have created a DNS A record pointing at my VPS' IP. I have then restarted the DNS server and waited up to 24 hours. But trying ping sub1.my.domain.tld results in an unknown host error. So I know there's more stuff involved, configuring apache etc. But so far, I cannot even get the subdomain working at all, let alone serve up the right content. I have also tried a CNAME record, to no effect. I have also tried creating a regular subdomain with a fixed name, which also does not work. Pre-configured subdomains DO work, like ftp.my.domain.tld or mail.my.domain.tld. I am clearly missing something here, but my hosting provider charges a small fortune for any support request not involving hardware physically burning down, so I'm hesitant to ask them. Any ideas?

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• Amazon AWS Ec2 instance, Elastic IP, Domain name from external domainseller, and Google Apps for Email

  - by Sid

  We are hosting our site on an Ec2 instance. Our Elastic IP is w.x.y.z and Public DNS is: ec2-w-x-y-z.compute-1.amazonaws.com. We've bought a domain name domainname.com from a lesser known domain-name-seller. We added an A-record pointing domainname.com to w.x.y.z. Will this work or do we need a CNAME record to point to the same too? We wanted to use Google apps for emailing so adjusted the TXT/MX records according to the Google Apps instructions to be able to send/recv email using @domainname.com email addresses. Have we got it right, more important, we came across queries relating to email sent from ec2-w-x-y-z.compute-1.amazonaws.com (our users can send email from their onsite accounts) going to spam (rDNS not pointing to domainname.com but to ec2-w-x-y-z.compute-1.amazonaws.com). How can we fix this? We came across SPF records, do they provide a complete solution? We aren't sure as to how to use them. Can you help pls? Thank you, Sid

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• How to fix a Postfix/MySQL/Dovecot Unknown Host Issue?

  - by thiesdiggity

  I am having an issue with one of my Postfix/Dovecot mail servers and I'm unsure how to fix the problem. I will try to explain it in detail, here it goes: I have an Ubuntu server setup using Virtual hosting with Postfix, Dovecot and MySQL. We have one domain setup as a virtual domain, for this example I am going to use mail.example.com. Under that domain we have one email address. I have another server (MS Exchange) setup using another one of my sub-domains, ex.example.com. The problem is that when I SMTP into the account on mail.example.com and try to send an email to an account on ex.example.com, I get the email returned back to us with an "unknown host" error. Now, I know that the mail.example.com server can resolve the ex.example.com domain because I can ping/dig while SSH'd into it. I can also log into Postfix via Telnet and send an email to an ex.example.com mailbox. I'm guessing that it has something to do with Postfix/Dovecot looking locally for the domain in the virtual domain list because of the tld domain (example.com)? If that's the case, how do I get Postfix/Dovecot to only look locally for the entire URL (mail.example.com) and if it doesn't find it, send it to the correct server by looking up the MX/A records (which I know exist and are setup correctly)? I have been working on this all day and any guidance would be GREATLY appreciated! Thanks for your time!

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• If spaces in filenames are possible, why do some of us still avoid using them?

  - by Chris W. Rea

  Somebody I know expressed irritation today regarding those of us who tend not to use spaces in our filenames, e.g. NamingThingsLikeThis.txt -- despite most modern operating systems supporting spaces in filenames. Non-technical people must look at filenames created by geeks and wonder where we learned English. So, what are the reasons that spaces in filenames are avoided or discouraged? The most obvious reason I could think of, and why I typically avoid it, are the extra quotes required on the command line when dealing with such files. Are there any other significant reasons, other than the practice being a vestigial preference? UPDATE: Thanks for all your answers! I'm surprised how popular this was. So, here's a summary: Six Reasons Why Geeks Prefer Filenames Without Spaces In Them It's irritating to put quotes around them when referenced on the command line (or elsewhere.) Some older operating systems didn't used to support them and us old dogs are used to that. Some tools still don't support spaces in filenames at all or very well. (But they should.) It's irritating to escape spaces when used where spaces must be escaped, such as URLs. Certain unenlightened services (e.g. file hosting, webmail) remove or replace spaces anyway! Names without spaces can be shorter, which is sometimes desirable as paths are limited.

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• Hyper-V Guests Dying

  - by Jon Rauschenberger

  I just hit my THIRD instance of a Hyper-V guest machine dying with the exact same behavior. In all three instances we are hosting WS2008 guests on a WS2008 host. AFter a config change, we reboot the guest and the guest OS comes up but in a very cripled state. Specifically, we are able to log into the guest, but can't launch any apps and the guest never comes active on the network. I opened a support ticket with MS the second time this happened and they focused in on the DCOM subsystem not coming up...best explanation they could provide was that permissions on key system files got corrupted. I eventually gave up on the ticket after close to 10 hours on the phone trying different things that were going no where. What really concerns me is that we have now seen the exact same thing happen to a guest hosted on a completly differet host machine. There is zero hardware overlap between the two. Has anyone seen this before?? It's really odd behavior, but it also seems like there's a pattern here that's concerning me. Thanks, jon

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• Need to link WP Blog with Rails App on Heroku

  - by John Glass

  I have a client who wants to migrate his Rails app to Heroku. However the client also has a blog associated with his domain that runs on WordPress. Currently, the WordPress blog is running happily alongside the Rails app, but once we migrate to Heroku, that clearly won't be possible. The url for the app is like http://mydomain.com, and the url for the blog is like http://mydomain/blog. I realize that the best long-term solution is to redo the blog in a Rails format like Toto or Jekyll. But in the short term, what is the best way to continue hosting the WP blog where it is (or somewhere) but use Heroku to run the app? The client doesn't want the blog to be on a subdomain, but to remain at mydomain/blog for SEO reasons and also since there is traffic to the blog. I have two ideas: Use rack_rewrite or refraction (or just a regular old 301 and Apache mod_rewrite) on the old (non-Heroku) server to redirect the main url from the old site to Heroku. In this case, I can just leave the Wordpress blog running happily where it is. I think?? Is there a reason to choose one of those options (rack_rewrite, refraction, or mod_rewrite) over the others if I do it this way? Switch the DNS info to point to the Heroku site, and then use a 301 redirect from the blog to the old site. But then I'll have to get the old (non-Heroku) site on a subdomain and use some kind of rewrite rules anyway so it looks like it isn't a subdomain. Are either of these approaches preferable, or is there another way to do it that's easier that I'm missing?

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• iOS 6 in-app email does not send from within any app that supports it

  - by Joe Termine

  A strange problem -- Last night I upgraded to the final release of iOS 6 on my iPhone 4S and my iPad 2. When I open an app that allows you to send emails from within the app (e.g. adobe Reader, TurboScan, etc.) -- doesn't matter which one -- I am prompted with the email dialog from within the app, I can compose the message, but when I go to send one of two things will happen: either the email sending sound will "swoosh" and the dialog will close (leading me to think it worked) or some apps with good error handling will say there is an "error sending email." The error logs on my device are not reporting errors. It's just that the email doesn't really send. I have two Exchange mail boxes on these devices. One connects to a corporate network hosting on-premise exchange 2007 and the other connects to Gmail over the exchange interface. Have attempted to delete and re-pair these accounts (one at a time) without any change. I'm wondering if others are experiencing this problem, or whether I should just wipe the devices and chalk it up to (another) failed upgrade. Thoughts much appreciated. Joe

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• What is consuming so much memory?

  - by Christopher

  Hi, I am having a few problems with my server. It is throwing up intermittant errors and running quite slow. Here is the output from top: top - 07:33:33 up 18:57, 1 user, load average: 0.00, 0.00, 0.00 Tasks: 90 total, 1 running, 82 sleeping, 7 stopped, 0 zombie Cpu(s): 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st Mem: 1048576k total, 1048576k used, 0k free, 0k buffers Swap: 0k total, 0k used, 0k free, 0k cached Ordered by %MEM: PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 9597 root 16 0 276m 91m 15m S 0.0 8.9 0:29.38 java 9564 tomcat 15 0 249m 34m 11m S 0.0 3.4 0:11.79 java 9636 root 18 0 54804 24m 9784 S 0.0 2.4 0:02.58 httpd 26139 apache 15 0 57520 23m 5996 S 0.0 2.3 0:00.15 httpd 16264 apache 18 0 56984 23m 6104 S 0.0 2.2 0:00.21 httpd 24294 apache 15 0 57512 22m 5864 S 0.0 2.2 0:00.17 httpd 30231 apache 15 0 57272 22m 5748 S 0.0 2.2 0:00.97 httpd 32257 apache 15 0 57512 22m 5416 S 0.0 2.2 0:00.46 httpd 19947 apache 15 0 57512 22m 5320 S 0.0 2.2 0:00.19 httpd 26148 apache 15 0 56688 22m 5992 S 0.0 2.2 0:00.40 httpd 14039 apache 18 0 57000 22m 5492 S 0.0 2.2 0:00.33 httpd 6051 apache 15 0 57736 22m 5128 S 0.0 2.2 0:00.07 httpd 19937 apache 15 0 56992 22m 5400 S 0.0 2.2 0:00.14 httpd 5200 apache 15 0 56984 22m 5376 S 0.0 2.2 0:00.23 httpd 10001 apache 15 0 55636 21m 5636 S 0.0 2.1 0:01.05 httpd 11734 apache 15 0 56712 21m 4548 S 0.0 2.1 0:00.46 httpd 18193 apache 15 0 55100 20m 5508 S 0.0 2.0 0:00.24 httpd 14036 apache 15 0 55128 20m 5412 S 0.0 2.0 0:00.10 httpd 3981 apache 15 0 55128 19m 4860 S 0.0 1.9 0:00.16 httpd 7588 apache 18 0 55112 19m 4848 S 0.0 1.9 0:00.04 httpd 19768 apache 16 0 55112 19m 4844 S 0.0 1.9 0:00.02 httpd 5827 apache 15 0 55112 19m 4828 S 0.0 1.9 0:00.05 httpd 29774 apache 15 0 55112 19m 4544 S 0.0 1.9 0:00.11 httpd 6064 apache 15 0 55112 19m 4536 S 0.0 1.9 0:00.02 httpd 16253 apache 17 0 55116 19m 4532 S 0.0 1.9 0:00.01 httpd 19922 apache 15 0 55112 19m 4540 S 0.0 1.9 0:00.02 httpd 10010 apache 15 0 55100 19m 4524 S 0.0 1.9 0:00.01 httpd 18195 apache 18 0 55104 18m 3872 S 0.0 1.8 0:00.02 httpd 7361 mysql 15 0 134m 18m 6400 S 0.0 1.8 0:10.18 mysqld 19921 apache 15 0 55088 18m 3588 S 0.0 1.8 0:00.02 httpd 11967 apache 15 0 55080 18m 3584 S 0.0 1.8 0:00.00 httpd 13813 apache 15 0 55088 18m 3576 S 0.0 1.8 0:00.14 httpd 23898 apache 18 0 54968 17m 3212 S 0.0 1.7 0:00.00 httpd 13792 apache 15 0 54968 17m 3088 S 0.0 1.7 0:00.00 httpd 14083 apache 15 0 54968 17m 3088 S 0.0 1.7 0:00.00 httpd 32547 apache 15 0 54944 17m 2924 S 0.0 1.7 0:00.00 httpd 13787 apache 15 0 54944 17m 2908 S 0.0 1.7 0:00.00 httpd 3623 apache 17 0 54944 17m 2908 S 0.0 1.7 0:00.00 httpd 16024 apache 19 0 54944 17m 2860 S 0.0 1.7 0:00.00 httpd 13791 apache 15 0 54944 17m 2864 S 0.0 1.7 0:00.00 httpd 20090 named 19 0 110m 4244 2056 S 0.0 0.4 0:01.55 named 9369 cyrus 15 0 15904 3048 1720 S 0.0 0.3 0:00.24 cyrus-master 32735 root 15 0 8852 2888 2116 T 0.0 0.3 0:00.00 mysql The intermittant error I get using Firefox is: Server not found Firefox can't find the server at XXXXXXX.co. * Check the address for typing errors such as ww.example.com instead of www.example.com * If you are unable to load any pages, check your computer's network connection. * If your computer or network is protected by a firewall or proxy, make sure that Firefox is permitted to access the Web. And on other browsers, the page just loads for about 10 minutes but never appears. The only way to resolve it is to close the browser completely as the error appears to be saved in the cache. Has anyone got any ideas? Many Thanks.

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• Apache directory structure with multiple hosted languages.

  - by anomareh

  I just got a new work machine up and running and I'm trying to decide on how to set everything up directory wise. I've done some digging around and really haven't been able to find anything conclusive. I know it's a question with a variety of answers but I'm hoping there's some sort of general guidelines or best practices to go by. With that said, here are a few things specific to my situation. I will be doing actual development and testing on the same machine as the server. It is a single user machine in the sense that I will be the only one working on the machine. There will be multiple hosted languages, specifically PHP and RoR while possibly expanding later. I'd like the setup to translate well to a production environment. With those 3 things in mind there are a couple of things I've had in the back of mind. Seeing as it's a single user machine I haven't been able to decide whether or not I should be working on things out of my home directory or if they should be located outside of it. I'm feeling that outside of a user directory would be better as it would translate better to a production environment, but I'm also not sure if that will come with any permission annoyances or concerns seeing as I'll be working on the same machine. Hosting multiple languages seems like it may be a bit quirky. With PHP I've found you're generally just dumping the project somewhere in the document root where as something like a Rails app you have the entire project and you only want the public directory in the document root. Thanks for any insight, opinion, or just personal preference from experience anyone can offer.

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• Emails from web site sometimes blank or gibberish

  - by John Gardeniers

  Our company has one web site with an online store based on osCommerce. The system sends emails for various reasons, such as password changes, order confirmations, etc., using PHP's mail() function. We occasionally have customers report that the email they received is either blank (email is plain text format) or gibberish (email is in HTML format). In the latter case it's really just HTML that's being displayed as raw text but of course the customers can't read it. In this case the first opening tag's <, and sometimes a few more characters, has gone missing. In an attempt to determine whether this was happening only for certain customers or email systems I configured the web site to send a CC of each message to a service account at my end. Those CC'd messages always arrive intact and display correctly in Outlook. For what it's worth, it seems to happen a little more frequently to Hotmail users but is certainly not limited to them. As the web site is on a shared (Debian) host there's precious little I can do about debugging things from that end, although if I made the right request I feel the hosting company staff would help me, even though they have limited resources to spend on such matters. Any suggestions on what else I might do to try and determine just why those emails are not being received correctly by some customers, yet a CC copy arrives just fine?

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• Upgrading from SQL2000 database to SQL Express 2008 R2

  - by itwb

  Hi, We have a web application which uses a MSSQL 2000 backend database. We are currently paying a ridiculous amount for Shared Hosting, with the database costs alone costing us $150 per month (MSSQL 100mb extra space is $40 per month). Our database size is 896.38 MB I am looking at getting a Virtual Private Server and upgrading the database to a MSSQL2008 Express database. I am aware that the Express version is limited to a 10GB database (with R2), and is constrained to a single CPU. I have also been offered SQL Server 2008 Web Edition for $19/per month, but I cannot find many details on the difference between Express and Web. Any suggestions here? What I would also like to know is: If we upgrade the database to MSSQL 2008 database, is there any issues with possible data transformations in the future? I.e. Is it possible to download and mount it with SQL Server 2008 Standard edition? I'm more concerned about how to get data in and out of the database through SQL Management tools. Are there any other issues that I might face? Thanks, Mike

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• RSA keys - virtual hosts

  - by Bosworth99

  Pardon my noobness, but I just got started with VPS (linux) hosting; setting up passwordless ssh for multiple users has proved to be kind of a pain. Currently I'm the single user of this ubuntu 10.04 LTS VPS (linode.com). I was able to establish a single rsa passkey under my home/user/.ssh/authorized_keys location. Fine. PuTTy works as expected, and Filezilla (sftp) links up as required. I've been working on a single site that this user owns, and thats not been a problem. Now, I want to set up some other sites, and I've chosen Webmin with the VirtualMin plugin to make this work. I made another user (or, rather, virtualmin did), but I've been unable to get FileZilla to link up to this new user. Could anyone with experience here explain what the setup is supposed to look like? IE - can I use a single rsa key pair for all accounts (if, for example, I give ownership of files to the original user?). Or is it standard practice to create a separate key pair for each user, and establish a separate putty/filezilla login for each? I've spent enough time dinking around with this to be frustrated. "Sever rejected the provided key" error sucks after the fifth hour. I'm about to set up an ftp server and call it a day. Any thoughts would be most welcome -

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• Have I pushed the limits of my current VPS or is there room for optimization?

  - by JRameau

  I am currently on a mediatemple DV server (basic) 512mb dedicated ram, this is a CentOS based VPS with Plesk and Virtuozzo. My experience with it from day 1 has been bad and I only could sooth my server issues with several caching "Band-aids," but my sites are not as small as they were a year ago either so the issues have worsen. I have 3 Drupal installs running on separate (plesk) domains, 1 of those drupal installs is a multisite, that consists of 5-6 sites 2 of those sites are bringing in actual traffic. Those caching "Band-aids" I mentioned are APC, which seemed to help alot initially, and Drupal's Boost, which is considered a poorman's Varnish, it makes all my pages static for anonymous users. Last 30day combined estimate on Google Ananlytics: 90k visitors 260k pageviews. Issue: alot of downtime, I am continually checking if my sites are up, and lately I have been finding it down more than 3 times daily. Restarting Apache will bring it back up, for some time. I have google search every error message and looked up ways to optimize my DV server, and I am beyond stump what is my next move. Is this server bad, have I hit a impossibly low restriction such as the 12mb kernel memory barrier (kmemsize), is it on my end, do I need to optimize some more? *I have provided as much information as I can below, any help or suggestions given will be appreciated Common Error messages I see in the log: [error] (12)Cannot allocate memory: fork: Unable to fork new process [error] make_obcallback: could not import mod_python.apache.\n Traceback (most recent call last): File "/usr/lib/python2.4/site-packages/mod_python/apache.py", line 21, in ? import traceback File "/usr/lib/python2.4/traceback.py", line 3, in ? import linecache ImportError: No module named linecache [error] python_handler: no interpreter callback found. [warn-phpd] mmap cache can't open /var/www/vhosts/***/httpdocs/*** - Too many open files in system (pid ***) [alert] Child 8125 returned a Fatal error... Apache is exiting! [emerg] (43)Identifier removed: couldn't grab the accept mutex [emerg] (22)Invalid argument: couldn't release the accept mutex cat /proc/user_beancounters: Version: 2.5 uid resource held maxheld barrier limit failcnt 41548: kmemsize 4582652 5306699 12288832 13517715 21105036 lockedpages 0 0 600 600 0 privvmpages 38151 42676 229036 249036 0 shmpages 16274 16274 17237 17237 2 dummy 0 0 0 0 0 numproc 43 46 300 300 0 physpages 27260 29528 0 2147483647 0 vmguarpages 0 0 131072 2147483647 0 oomguarpages 27270 29538 131072 2147483647 0 numtcpsock 21 29 300 300 0 numflock 8 8 480 528 0 numpty 1 1 30 30 0 numsiginfo 0 1 1024 1024 0 tcpsndbuf 648440 675272 2867477 4096277 1711499 tcprcvbuf 301620 359716 2867477 4096277 0 othersockbuf 4472 4472 1433738 2662538 0 dgramrcvbuf 0 0 1433738 1433738 0 numothersock 12 12 300 300 0 dcachesize 0 0 2684271 2764800 0 numfile 3447 3496 6300 6300 3872 dummy 0 0 0 0 0 dummy 0 0 0 0 0 dummy 0 0 0 0 0 numiptent 14 14 200 200 0 TOP: (In January the load avg was really high 3-10, I was able to bring it down where it is currently is by giving APC more memory play around with) top - 16:46:07 up 2:13, 1 user, load average: 0.34, 0.20, 0.20 Tasks: 40 total, 2 running, 37 sleeping, 0 stopped, 1 zombie Cpu(s): 0.3% us, 0.1% sy, 0.0% ni, 99.7% id, 0.0% wa, 0.0% hi, 0.0% si Mem: 916144k total, 156668k used, 759476k free, 0k buffers Swap: 0k total, 0k used, 0k free, 0k cached MySQLTuner: (after optimizing every table and repairing any table with overage I got the fragmented count down to 86) [--] Data in MyISAM tables: 285M (Tables: 1105) [!!] Total fragmented tables: 86 [--] Up for: 2h 44m 38s (409K q [41.421 qps], 6K conn, TX: 1B, RX: 174M) [--] Reads / Writes: 79% / 21% [--] Total buffers: 58.0M global + 2.7M per thread (100 max threads) [!!] Query cache prunes per day: 675307 [!!] Temporary tables created on disk: 35% (7K on disk / 20K total)

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• Low load average with plenty of cpu-intersive processes

  - by sds

  I see loadavg at about 1 with at least 3 processes running at full tile. How can that be? top - 11:48:32 up 147 days, 5:38, 8 users, load average: 1.08, 1.11, 1.05 Tasks: 416 total, 4 running, 410 sleeping, 2 stopped, 0 zombie Cpu0 : 43.3%us, 13.7%sy, 0.0%ni, 43.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st Cpu1 : 48.8%us, 12.4%sy, 0.0%ni, 38.8%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st Cpu2 : 0.7%us, 0.7%sy, 0.0%ni, 98.3%id, 0.0%wa, 0.0%hi, 0.3%si, 0.0%st Cpu3 : 99.3%us, 0.7%sy, 0.0%ni, 0.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st Cpu4 : 0.0%us, 0.3%sy, 0.0%ni, 99.7%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st Cpu5 : 5.7%us, 0.7%sy, 0.0%ni, 93.6%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st Cpu6 : 2.3%us, 0.3%sy, 0.0%ni, 97.4%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st Cpu7 : 0.3%us, 0.3%sy, 0.0%ni, 99.0%id, 0.0%wa, 0.0%hi, 0.3%si, 0.0%st Cpu8 : 38.4%us, 17.4%sy, 0.0%ni, 44.2%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st Cpu9 : 43.4%us, 13.5%sy, 0.0%ni, 43.1%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st Cpu10 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st Cpu11 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st Cpu12 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st Cpu13 : 0.3%us, 0.3%sy, 0.0%ni, 99.3%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st Cpu14 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st Cpu15 : 1.0%us, 0.7%sy, 0.0%ni, 98.3%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st Mem: 132145404k total, 88125080k used, 44020324k free, 516476k buffers Swap: 8388600k total, 620232k used, 7768368k free, 55729064k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 25424 jonathan 20 0 4404m 4.1g 3268 R 99.7 3.3 212:58.17 python2.7 20939 sam 20 0 908m 733m 3376 R 81.2 0.6 603:08.07 python2.7 20987 sam 20 0 908m 732m 3376 R 79.8 0.6 598:49.18 python2.7 25428 jonathan 20 0 774m 164m 15m S 14.2 0.1 24:22.60 java 20996 sam 20 0 98.4m 7780 1880 S 4.3 0.0 17:48.15 vw 20941 sam 20 0 161m 70m 1880 S 3.0 0.1 18:10.03 vw 20940 sam 20 0 98.4m 8068 1880 S 2.6 0.0 18:06.28 vw 20942 sam 20 0 98.4m 8080 1880 S 2.6 0.0 17:39.45 vw 20944 sam 20 0 161m 71m 1880 S 2.6 0.1 17:29.29 vw 20947 sam 20 0 161m 71m 1880 S 2.6 0.1 17:25.58 vw 20959 sam 20 0 161m 70m 1880 S 2.6 0.1 17:28.00 vw 20962 sam 20 0 161m 70m 1880 S 2.6 0.1 17:26.96 vw 20963 sam 20 0 98.4m 8076 1880 S 2.6 0.0 18:07.19 vw 20965 sam 20 0 161m 71m 1880 S 2.6 0.1 18:08.13 vw 20995 sam 20 0 161m 71m 1880 S 2.6 0.1 17:38.67 vw 6399 root 20 0 558m 19m 5028 S 2.3 0.0 4329:56 BESClient 20945 sam 20 0 98.4m 8068 1880 S 2.3 0.0 17:35.38 vw 20948 sam 20 0 98.4m 8068 1880 S 2.3 0.0 17:26.01 vw 20950 sam 20 0 161m 70m 1880 S 2.3 0.1 17:25.79 vw 20952 sam 20 0 98.4m 8076 1880 S 2.3 0.0 17:32.94 vw 20955 sam 20 0 161m 70m 1880 S 2.3 0.1 17:26.61 vw 20956 sam 20 0 98.4m 8072 1880 S 2.3 0.0 17:34.76 vw 20960 sam 20 0 98.4m 8072 1880 S 2.3 0.0 17:34.04 vw Adding up CPU loads gives about 300%. The top process list also adds up to about 300%. Why is load average about 1?

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• Cent OS ifcfg configuration for ranges of IP's with different netmask

  - by Aaron Schlegel

  I have 1 set of 30 public IP's with a netmask of 255.255.255.0 and another set of 30 IP's with a netmask of 255.255.255.128. Both sets of IP's also have different gateways. How can I virtually assign the IP's to the machine? I have tried creating ifcfg-eth0:0 ifcfg-eth0:1 ifcfg-eth0:X ect for each IP. Below is my ifcfg file with. I have this for each IP with the correct gateway IP and netmask for each of my 60 IP's. If I do ip addr show it does show all of the 60 addresses with the correct broadcast IP and netmask. However I can only use 30 of my IP's that are from the same netmask. Am I doing this correctly? If the IP's show up with ip addr show does that mean I have correctly assigned them to the machine virtually? I want to check before I blame my hosting company for not routing the IP's correctly. DEVICE="eth0:1" BOOTPROTO="static" DNS1="**.**.**.**" DNS2="**.**.**.**" GATEWAY="2**.**.***.126" HOSTNAME="localhost.localdomain" HWADDR="0*:19:**:**:**:**" IPADDR="2**.*.**.**" IPV6INIT="no" MTU="1500" NETMASK="255.255.255.128" NM_CONTROLLED="yes" ONBOOT="yes" TYPE="Ethernet" Also is there a better way to do this? I have used ifcfg-eth0:0-range1 before to assign a range of IP's from the same netmask. Is it possible to do this with ranges with different netmask? Thanks!

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