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  • Starting with administering a linux box

    - by Josh K
    I'm rather new to this, and I'd like to play with administering a linux box. Things I need to know how to do: Setup subdomains Setup FTP accounts Setup full domains / add domains MySQL setup / install / management LAMP setup / install / management This is probably going on a CentOS distro. I'd like links or a break down on how I can learn to do this. I am comfortable with a command line, but I'm trying to move from shared hosting to a VPS and would like to have some idea on how deep the water is before I do.

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  • What would be better in my case - apache, nginx or lighttpd ?

    - by The Devil
    Hey everybody, I'm writing a php site that's expected to get about 200-300 concurrent users browsing it. When initializing the application will load about 30 php classes, some 10 maybe 15 images and a couple of css files. So my question is what else can I do (except optimizing my code and using apc/eaccelerator for php) to get as close as possible to those numbers of concurrent users ? Currently we haven't chosen a server for the site to be hosted on but most probably it'll be a VPS Dual core + 2 or maybe 4gb ram. Is it possible for such a server to handle that load ? Also how could I test it myself and be sure that it'll be able to handle it ? Thanks in advance, Me

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  • How to forward blocked ports by ISP

    - by KiDo
    So I've been trying to setup a TeamSpeak 3 server on my pc but ports (9987,10011,30033) are blocked by my ISP, I've contacted them to unblock them but they didn't accept, and it's the fastest ISP in my city (as living in a 3rd world country) so it's not a good idea to connect to another ISP. The thing is, I've tried Your-Freedom to connect to tunnel my connection & SocksCap. The problem is, when TS works with SocksCap it doesn't show a WAN-IP that friends will use to connect to my server It says "Needs to be Requested" and when I press the Request button, I get nothing. So, any idea what's wrong if someone has done this before? or if you have any other suggestion to run a TS server, would be very glad to hear it and really appreciate that. P.S. as I've mentioned before, living in a 3rd world country, makes me unable to buy a VPS even the cheapest one cause there's no Visa, Credit, or paypal. so that won't work. Thanks in advance.

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  • How much memory should my rails stack be consuming?

    - by Hamish
    I am running my own webserver on a 384MB VPS from Slicehost to serve two Ruby on Rails applications on separate Virtual Hosts. I am running Phusion Passenger with Apache2. The following is the contents of my Passenger.conf <IfModule passenger_module> PassengerRoot /opt/ruby-enterprise-1.8.6-20090610/lib/ruby/gems/1.8/gems/passenger-2.2.11 PassengerLogLevel 0 PassengerRuby /usr/local/bin/ruby PassengerUserSwitching on PassengerDefaultUser nobody PassengerMaxPoolSize 3 PassengerMaxInstancesPerApp 2 PassengerPoolIdleTime 300 # Ruby on Rails Options RailsAutoDetect on RailsSpawnMethod smart NameVirtualHost *:80 If i do a 'top' on my server I have 314MB used on average, this seems like too much? Am I mistaken and if not what possible steps can I take to reduce the Memory usage? Thanks!

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  • NTP doesn't sync

    - by Jonathan
    I'm using Meinberg NTP to sync the time in a VPS. The clock refuses to sync - there's a ~30s shift comparing to other servers. Meinberg NTP comes with a status script that checks hte delay\jitter every 10s and it is showing all zeros. Actions I've taken which didn't help: Restarted the NTP service using a script that comes with Meinberg NTP Added port 123 for UDP and TCP as an exception port to Windows Firewall Added Meinberk NTP executables as an exception program to Windows Firewall validated iburst appears after each server listed in the configuration file Restarted the server The OS is a Windows Server Standard SP2 32bit. What did I miss?

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  • Apache not directing to correct VHost

    - by BANANENMANNFRAU
    I have setup the following virtual host ServerAdmin [email protected] ServerName mysite.com ServerAlias www.mysite.com DocumentRoot /var/www/homepage/public_html ErrorLog ${APACHE_LOG_DIR}/error.log CustomLog ${APACHE_LOG_DIR}/access.log combined When I hit my url Apache still shows the default page. Not the index Ive created in the give Document root. In my Domain i have set the A Record to the Ip of my VPS: apache2ctl -S: output: VirtualHost configuration: *:80 is a NameVirtualHost default server xxxxxx.stratoserver.net (/etc/apache2/sites-enabled/000-default.conf:1) port 80 namevhost xxxxxxx.stratoserver.net (/etc/apache2/sites-enabled/000-default.conf:1) port 80 namevhost mysite.com (/etc/apache2/sites-enabled/homepage.conf:1) alias www.mysite.com ServerRoot: "/etc/apache2" Main DocumentRoot: "/var/www" Main ErrorLog: "/var/log/apache2/error.log" Mutex default: dir="/var/lock/apache2" mechanism=fcntl Mutex mpm-accept: using_defaults Mutex watchdog-callback: using_defaults PidFile: "/var/run/apache2/apache2.pid" Define: DUMP_VHOSTS Define: DUMP_RUN_CFG User: name="www-data" id=33 not_used Group: name="www-data" id=33 not_used How would I need to setup my Virtual host so that apache shows the correct site depending on the Domain im redirecting from.

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  • How can I upgrade bash to >= 4.1 on CentOS 5.5?

    - by Agvorth
    I have a CentOS 5.5 VPS server. I want to use RVM. According to the console output when I run the RVM installer, RVM requires bash = 4.1. I just ran yum update. My bash version is now 3.2.25. If I understand how yum works, that means that 3.2.25 is sort of the version of bash that "belongs with" my CentOS version, and it's the latest version I can get using yum. (Right? Or am I wrong about this?) How can I get that on my CentOS 5.5 system? To clarify, I understand that I can just download the source and install, but I'm hesitant to break out of yum's version management system. Is there a way to upgrade bash without disrupting yum?

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  • Minimal Lunix distribution with sshd and apt

    - by Sergey Mikhanov
    When I signed up for my Debian Linux VPS hosting and first logged on and invoked ps, there was the only user process running: sshd. As I can see, this was minimal Linux with only two things installed and configured: sshd and apt (plus all dependencies, of course). I want to build (or use existing) similar Linux distro, any advice on how to build (or pick) one? Googling "minimum linux", or "linux with sshd only" usually brings up Debian's netinstall, which is not what I want. Thanks in advance.

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  • my domain.com is pointing to two different IP addresses

    - by user43726
    Initially my domain , mycompany.com points to this IP: - 123.456.789.101 (sample only) Then i got another VPS and then decided to move the mycompany.com into this new IP/Host: - 987-654-123.123 (sample only) I changed the necessary stuff like DNS, etc. from my domain management panel. But when i ping it : ping mycompany.com , sometimes it gives the first IP, sometimes the second one. Also when i visit the url from the browser, sometimes it loads, sometimes it doesn't. How can i solve this? Please help. Thanks

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  • How to Setting up Amazon EC2 with own OS and DB ?

    - by Spencer Lim
    i got my own version of OS and DB which are window server 2008 Hyper-V R2 and Sql server R2 2008 both in enterprise version may i know how to configure it up and running ? with amazon EC2, what other is a must combination to make it run ? also how could i install the operating system and DNS ? i never doing server before, but i just need something like VPS to support my development and testing. Amazon Ec2 seem the best and cheapest service due to only $1 per hour. Appreciate if Any brief guide provided, Thx =D

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  • Configure Postfix for outgoing mail

    - by Savvas Sopiadis
    I have the following scenario i must implement using Postfix (but don't know how to begin): Say we have a domain aaa.com which is hosted somewhere (this is already functioning without any problems). On this envirnoment there is already a Mail server though which we can send and receive mail (this mail server is limiting us to a very small number of emails/day). Now we have setup a VPS (virtual private server) on which we installed Postfix, which sole porpuse is to send emails on behalf of domain aaa.com. The Postfix server will be used by a program like Outlook to send the email. What configuration has to be done? (i 'm a bloody beginner in this field!) Thanks in advance

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  • ProFTPd not in boot: Debian

    - by 50ndr33
    I just configured my new VPS with Apache, PHP, MySQL and ProFTPd. I wanted to install a smtp server, but I was advised to do a apt-get upgrade first. I did this, and I got up a blue screen where I could choose between two alternatives. It said something about GRUB 2 installer. I chose the alternative that was already selected, the topmost. I chose not to update the GRUB2, and use the old one that was installed. Now, ProFTPd doesn't start in boot anymore. I have to /etc/init.d/proftpd start every time. How do I fix this? Should I have chosen to update GRUB2? Should I do apt-get upgrade again and try to do the same GRUB2 installer again?

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  • Xen HVM guest has severe clock drift

    - by ipartola
    I am seeing a very severe clock drift on my Xen HVM VPS, rented from a hosting provider, so I don't have access to the dom0 system. I continuously run ntpd, but the clock drifts by as much as 30 seconds in 5 minutes and NTP cannot keep up. Has anyone experienced this? Here are some details: $ dmesg | grep clock [ 0.160000] Measured 347 cycles TSC warp between CPUs, turning off TSC clock. [ 0.396000] * this clock source is slow. Consider trying other clock sources [ 0.550448] Switching to clocksource acpi_pm [ 0.653135] rtc_cmos 00:05: setting system clock to 2011-03-09 02:45:40 UTC (1299638740) $ cat /sys/devices/system/clocksource/clocksource0/available_clocksource acpi_pm $ cat /sys/devices/system/clocksource/clocksource0/current_clocksource acpi_pm

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  • How do you keep up with Nagios/Capistrano configs when using EC2?

    - by imaginative
    I use Amazon EC2 for my mobile app. Depending on load of the application at a given time, I might spawn new instances and then take them down when load is lower to save costs. How does one keep up with Nagios configurations for such a dynamic environment? When one deals with managed hardware, configuration files are predictable. In this case Nagios, Capistrano and a bunch of other configuration files would need to be added. Capistrano needs to know where to deploy a new build to for an app server. Nagios needs to know to remove an existing instance or add a new instance for monitoring. Nagios also needs to know if a node was intentionally taken down or if the host is down due to error. How is this done with the wonderful world of VPS/dynamic instances?

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  • Reverse proxy for a subdirectory in nginx

    - by Maple
    I want to set up a Reverse proxy on my VPS for my Heroku app (http://lovemaple.heroku.com) So if I visit mysite.com/blog I can get the content in http://lovemaple.heroku.com I followed the instructions on the Apache wiki. location /couchdb { rewrite /couchdb/(.*) /$1 break; proxy_pass http://localhost:5984; proxy_redirect off; proxy_set_header Host $host; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; } I changed it to fit my situation: location /blog { rewrite /blog/(.*) /$1 break; proxy_pass http://lovemaple.heroku.com; proxy_redirect off; proxy_set_header Host $host; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; } When I visit mysite.com/blog, the page show up, but js/css file cannot be gotten (404). Their link becomes mysite.com/style.css but not mysite.com/blog/style.css. What's wrong and how can I fix it?

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  • What can cause peaks in pagetables in /proc/meminfo ?

    - by Fuzzy76
    I have a gameserver running Debian Lenny on a VPS host. Even when experiencing a fairly low load, the players start experiencing major lag (ping times rise from 50 ms to 150-500 ms) in bursts of 3 - 10 seconds. I have installed Munin server monitoring, but when looking at the graphs it looks like the server has plenty of CPU, RAM and bandwidth available. The only weird thing I noticed is some peaks in the memory graph attributed to "page_tables" which maps to PageTables in /proc/meminfo but I can't find any good information on what this might mean. Any ideas what might be causing this? If you need any more graps, just let me know. The interrupts/second count is at roughly 400-600 during this period (nearly all from eth0). The drop in committed was caused by me trying to lower the allocated memory for the server from 512MB to 256MB, but that didn't seem to help.

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  • Troubleshooting "connection reset" error on my linux server

    - by Chris
    I fervently hope someone here can help me with the problem I am experiencing. I am a programmer, and I have very little understanding of linux sysadmin terminology/concepts. I am attempting to troubleshoot a problem with my website. It is a Facebook app, and whenever I try to connect using Chrome, I get an error stating that the "connection was reset". I have been Googling for four days straight trying to find a solution to this problem, but no joy. A big part of the problem is that I do not understand the terminology being employed, and the output from many of the tools referenced is likewise indecipherable to me. I am running a VPS with CentOS 5, apache, PHP, and MySQL. I could spam this post with a ton of information from my iptables, apache, etc but if anyone needs information from my server, please let me know how to get it, and I will post it here. Thank you for any help you can offer!

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  • Quick change of SSH tunnel port forwarding options for SOCKS proxy

    - by user1335897
    The goal is to have access to internet thru SSH tunneling to SOCKS proxy. Me - ssh-on-my-vps - SOCKS proxy - internet Thing is I want to be able to quickly change the SOCKS proxy in this chain. If I use port forwarding on ssh, I assume I have to re-establish SSH tunnel with new SOCKS proxy address in parameters whenever I want to change proxy. Is that right? If it is, then I probably should always point SSH tunnel to localhost listening proxy server which will send requests to specified SOCKS proxy. So what local proxy I should choose that allows to easily change the destination SOCKS proxy via maybe reading from local file where I would put the SOCKS proxy address or via specifying new SOCKS address in its web-admin page?

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  • Storing Cards and PCI Compliance

    - by Nimbuz
    I'm developing a SaaS service and will be managing payments as a merchant for customers, and since we'll be using multipe payment processors depending on users location, amount and other factors so its important to store card details. I did some research and from what I understood all you need is a PCI compliant host (VPS, Dedicated or Private Cloud) and get it validated and certified through some provider like TrustWave etc... Is that correct or am I missing something? Also, would be great if you could suggest a few (not necessasrily cheap, but affordable) PCI compliant hosts. Many thanks

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  • Secure Apache Virtual Hosts?

    - by Dr Hydralisk
    I am going to host a few small sites on VPS, and each of them are going to run my own custom PHP scripts. I am fairly certain that they are secure (did everything in the book, plus some of which is not in the book) to make sure they can't be exploited. But just to be safe I want to know how I could secure each of the virtual hosts so that they can't escape from there virtual host (if a hacker uploaded a shell they could not go above the www folder a legitimate user can't do in ftp no matter how many times they click ..) folder on Debian and Apache.

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  • Stuck GhostScript processes, how to debug?

    - by Jonathan
    Having a problem with Ghostscript processes that don't end. This does not happen often, probably once every 3 weeks we see this issue with 1-3 processes. Running CentOS 6.4 on a VPS from Rackspace. We use PrinceXML to generate PDFs which uses GhostScript to handle fonts. Here's an image of top: http://i.stack.imgur.com/J9D7D.jpg As you can see those two processes are using a lot of resources, I haven't killed them yet in hopes someone can help me diagnose. I'm a developer not a server admin so I have a basic knowledge of *nix but no clue on how to fix this. Installed strace and ran it on each process with the following command: strace -p 20619 -s 80 -o gs.txt Left it for 5m, gs.txt is empty? Thanks in advance!

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  • postfix relay access denied from some IPs

    - by Caballero
    This is driving me nuts. I have Postfix/Dovecot set up on Centos 6 VPS for my emails. I can send and receive emails without any problems on my outlook (home broadband), on my Android phone (3G connection), however when I set up exactly the same email account on Outlook at my friends house I'm getting bouncebacks when I'm trying to send email (receiving works fine): 554 5.7.1 : Relay access denied Now if it wasn't working at all I'd understand, but why is it working on several internet connections, but not everywhere? Can someone shed some light on this? Where should I look for the problem?

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  • How to Configure Sendmail / Webmin for second IP?

    - by user310594
    Hi, LAMP Centos5.4 Webmin Until recently I have had all domains using "server1.example.com" Now I have newdomain.com on second.ip.address.works (works for DNS that is) Please tell me how to setup sendmail so the mail is sent from the second ip address? This is new for me: IF I need to create a second server called "server2.domain2.com", then please tell exactly how since I'm only experienced with one server per VPS. Whether "server2.domain2.com" needs to be created or not, here is exactly what is needed: # Mail being sent from domains using ns1.example.com needs to be sent from that server and that IP. Mail being sent from domains using nsother.example2.com sent from that IP + how to set up the second server / hostname, if needed. Thank you.

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  • Cannot access site via IP / hostname

    - by DaveB
    I am renting a VPS with Debian installed running JBoss AS6 for my web app. I recently had some problems with my DNS hosts as they messed up the A-records for my domain which caused some new A-records to be added by mistake The DNS problem is now sorted and the domain is working ok, however I noticed that the web server no longer responds via direct IP or hostname in a web browser (although it pings ok and I can SSH in using the hostname ok) Is there any explanation for this? I am using rinetd to forward traffic from 80 to port 8080 but thats been ok for a while Any suggestions would be appreciated Regards

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  • Alternatives to amavis for RAM-bound server

    - by rsuarez
    I'm running a small VPS server that works as web and mail server. It has only 256MB of RAM, and it's sucking 100MB of swap constantly. I've found that one of the culprits is amavis, taking about 30MB of resident memory, and would like to ditch it and use some alternative. I don't have much mail daily, so it being a bit slower wouldn't be a problem. I'd like to avoid Spamassassin altogether, if possible, because it's quite big even if used in offline mode. I'm already using RBLs and a few small blacklists, and used greylisting for a while but abandoned it because it gave me a few problems (don't remember which; I think it was related to not configuring properly white lists for several big ISPs). So, is there some alternative to amavis that I could use without much RAM (and if possible, CPU) usage? Thanks in advance.

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