General :: CentOS 5.5 VPS Web Server Has 'fallen Over' - How To Troubleshoot
Jan 26, 2011
I have a VPS that I'm using as a web/mail/DNS server (all-round server) and is repeatedly falling over every 12 hours or so. It seems to be since I used a Wordpress plugin on one of my sites to send out an email newsletter - I had problems with the plugin itself, anyway.
I think it might be causing a memory issue, as I've run 'free' and 'top', which sometimes causes a "fork:Cannot allocate memory" message to appear. Other times it displays statistics and suggests that there's plenty of memory available. Are there logs that I should look at and if so, what should I be looking for? Also, how can I stop this rogue plugin from doing anymore damage, seeing as it still appears to be running?
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May 21, 2010
Now that the server is set up, whats the best way to troubleshoot this server if problems should arise?
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Feb 27, 2010
How do I go about to troubleshoot the failure of ldap server start on openSUSE 11.2? I added a custom configuration (through GUI) and now the server does not whant to start with that configuration.
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Sep 18, 2010
I'm trying to get a game to work, the mac/wine client for Fallen earth. After reading a few things i was able to download the fallen earth dmg file (named fm.dmg now) and converted it to a img file (fm.img) using dmg2img. Then i mounted it using these commands.
neon@neon-laptop:~/Downloads$ sudo mkdir /media/mount
neon@neon-laptop:~/Downloads$ sudo modprobe hfsplus
neon@neon-laptop:~/Downloads$ sudo mount -t hfsplus -o loop fm.img /media/mount
I thought i was done. But it seems i cant copy the main file FEUpdaterMac.exe becasue i dont have permisssions. Tried and got the following
neon@neon-laptop:/media/mount/FallenEarth$ sudo chmod +rwx FEUpdaterMac.exe
chmod: changing permissions of `FEUpdaterMac.exe': Read-only file system
Now I'm stuck is there anything anyone can think of everything else seemed to copy but this file.
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Jun 2, 2011
I have been running squid3 proxy on a Ubuntu 10.04 machine for several months with no problems.It serves about 50 users ( win and Lin clients ) and is usually rock solid.
However, over the last few days problems occur.
The users lose connection and I have to restart squid and all is ok again. Sometimes it drops 4-5 times in an hour ans sometimes not for 6 hours or more. I know the problem is related to Squid as the actual internet connection is on and the squid machine can access the internet.
Restarting squid cures the problem.
How can I troubleshoot this ?
Checking the cache.log doesn't show anything strange as far as I can see.
Could it be that the cache file is full or something ?
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Jun 2, 2010
How to troubleshoot curropted Grub configuration in Redhat Enterprice Linux 5.
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Dec 18, 2010
I have the problem where the email was sent but not received by users.. The message as below code...troubleshoot
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Mar 28, 2011
How can I troubleshoot disk with 'dmesg' cmd ? How to distinquish :
- physical disk error
- file system corruption
What is I/O Error ?
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Jul 14, 2010
I installed the ubuntu 9.10 cd and for some reason as of last night it only boots halfway. it shows grub, shows loading keymap nd apparmor profiles, then before it shows mpd and apache load it erases everything and stops at a dark grey screen. all before i get a shell of any type. if i leave it alonethe screen still darkens like its going to sleep. is there any way to troubleshoot and fix this?
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Feb 9, 2010
This is a very simple problem, but I'm scratching my head with others..
In composing a simple shell script in class, we can't seem to get the script to execute fully. script was formatted as follows.
#!/bin/bash
echo "good bye for now"
exit
did, Chmod 755 to make executable
type file name "bye"
runs but wont exit.....
it just echos the type"good bye for now
The instructor says it works for him at home....
But it wont work in class...
Is there a reason it wont "exit" the shell as commanded ?
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Mar 21, 2010
I tried to install debian on my system using a small image at first that would download all the necessary components during the install. It loaded everything except Grub, and wont boot. I need to rescue this as the downloading of all the components took ages and I don't want to do that again.
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May 21, 2011
I am trying out a web server script on my Centos server. I uploaded the script in a folder called test in /var/www/html/test. After configuring appache and started the daemon and restarted httpd service, I am having this problem installing the script. The problem I am experiencing is "PHP script /var/www/html/test/classes/config.php is protected by phpSHIELD and requires the phpSHIELD loader phpshield.5.1.lin. The phpSHIELD loader has not been installed, or is not installed correctly. Please visit the phpSHIELD php encoder site to download required loader." I downloaded the files and searched the internet for where to put these files. There are lots of answers but none of them are definite and good answers. Does anyone know where to put these files on a Centos system?
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Aug 9, 2009
I recently installed F11 only to find my soundcard wasn't supported (Asus Xonar Essence STX). I read around a bit and saw that kernel 2.6.30 supported it, so I upped the kernel to 2.6.34
So I configured/compiled my kernel, restarted and it showed up fine in the boot loader. Only problem I have is when I go to login through the login prompt, it acts like it is going to login only to get kicked back out to the login prompt again. I tried to login through the terminal view.... everything checks out there.
I am fairly new to linux in general so I have no idea how to troubleshoot this. I tried finding an error in it but I couldn't find anything.
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Apr 8, 2010
I was trying to get rid of some sound issues, in the process I removed Pulseaudio, then I found a post with a couple of packages from a ppa that were made for using Alsa without pulseaudio. I can't find the link now as I'm on a different pc, but 1 package was named Gnome applet, another Gnome media (I think) and I can't recall the third. It really did nothing so I removed them and reinstalled the Pulseaudio packages to atleast get some sound back. I got right back where I started until I rebooted.
Now it gets to the splash screen, flickers a couple times and I get a giant generic login screen If I log into that, I go back to the splash screen and the same login all over again. I tried to repair packages with the recovery mode but it didn't do any good. I also tried renaming xorg.conf just for the hell of it so a new one would be made but that really didn't do anything either.
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Oct 19, 2010
I have a macbook specs here: I have discs for Ubuntu + Kubuntu, 10.04 and 10.10 for both. When I put these discs in the computer, it reads them and I can boot from them, although when I get to the initial screen where it asks you what to do, like install ect, , , , after I select an option the screen just goes black, I've waited up to 30 minutes but nothing. I can't troubleshoot anything because nothing comes up. I've tried searching online for similar problems to no avail.
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Jan 11, 2010
My Kubuntu installation (9.10) boots up normally and seems to run fine, other than it is very slow to respond to inputs or change screens/ applications etc. It can take 5-10 seconds to respond to simple requests like changing from firefox to dolphin by clicking in the taskbar. It is dual boot with XP, which also seems sluggish, but is bearable.
The computer is barely useable in Kubuntu because of the slow response. I had 9.04 installed before, same problem. I tried searching for drivers for the on board video, thinking that might be it, but came up empty.
[Code]...
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Oct 13, 2010
Just upgraded to maveric desktop and can't switch to console no longer. Pressing ctrl-alt-f1 etc pauses the screen and removes the mouse pointer, the console is not shown. Pressing ctrl-alt-f7 unfreezes the screen again and shows mouse pointer.
I know it doesn't happen to many other people but happened to me. Any ideas how to troubleshoot/fix?
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Jul 29, 2011
I have a laptop with SL6 installed on it.If I run 'top' i can see that the whole system just sticks/freezes for a moment here and there. The mouse becomes unresponsive during this time, *everything* freezes for a moment.I've put 'top' on with an interval of .1, and there isn't a particular program hitting the top of this list when it happens.
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Jun 1, 2009
I have a problem with compiling of mod_ruby-1.3.0 After a succesfull configure i get a error in the make, it say "make: *** [apachelib.o] error 1" . Here below you can find the results of de configuring and the make.I was following the roles in Howtoforge " The perfect server - Centos 5.3" everything goes perfect till mod_ruby-1.3.0
./configure.rb --with-apr-includes=/usr/include/apr-1
checking for a BSD compatible install... /usr/bin/install -c
checking whether we are using gcc... yes
[code]....
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Jul 26, 2010
is it possible to join Windows Server 2003 to CentOS 5 Cluster?
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Feb 22, 2011
when I reboot the server with centos 5.5 the SMB deamon doesn't start?
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Dec 3, 2009
I did a yum upgrade from Fedora 11 to Fedora 12. I can still use the Fedora 11 kernel just fine. When I try to boot with the Fedora 12 kernel, it failed during udev with "Kernel Panic. Not syncing. Out of memory and no killable processes."
I have no clue how to troubleshoot this problem since I cannot get the Fedora 12 kernel to any usable state. I've removed the kernel and reinstalled it multiple times. I've installed random firmware packages suggested throughout the web. I've tried to boot to console-only. Everything I do produces the same result - a kernel panic. Is there any magic trick to make the kernel stop panicking and actually boot up?
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Mar 26, 2010
I am running the Nvidia driver. My system freezes randomly. I've had to reboot my system over 5 times today alone. When it freezes, everything is frozen, even the second hand on the analogue clock. One more issue, and I'm not sure if it's related, my stupid screen goes black after 5 minutes of no typing or mouse movement. This never happended when I first installed it. The issue just started within the last 3 weeks. Kpackage Kit is hidden. I was using it to do my automatic updates. Now I just use yum. between the time I first installed Fedora 12 and now, something has happened to my build to cause these issues.
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Jan 31, 2010
Wireless not working. get that to work?
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Apr 16, 2010
am having issues with a corrupted ext4 filesystem. My machine has run flawlessly for weeks, then all of a sudden I am getting messages that I can't access various directories, and on reboot fsck dumps to a command line. So far I have been able to fix the problem by manually running fsck. However, this is the second time that I have run into this problem; the previous time I ended up throwing out my hard drive and doing a clean install.I am running a clean install of Karmic Koala, software RAID, 4 Gb RAM, two 500 Gb Western Digital SATA drives, with an Intel E7200 2.53 Ghz dual core processor.Among other applications, I run VMware 7.0 for the occasional task for which I need a Windows program.
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Apr 22, 2010
I installed Simple Backup Suite [URL] on this Karmic box last week and it ran fine the first time. Now it locks up shortly after I tell it to run a backup. ps shows
Code:
3273 ? 00:00:01 gksu
3274 ? 00:00:01 simple-backup-c
3279 ? 00:00:02 sbackupd <defunct>
3287 pts/0 00:00:00 ps
I re-installed the application, which didn't help.
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Jun 2, 2010
My local area network is always time out for few seconds.I have check my memory with "free -m"There are still left 200+ mb left.I am hosting my own ubuntu server, and I share the same internet line with my server and pc. when I access to LAN, I need to type 192.168.2.2, at outside I can access to [URL]It is only the LAN access timeout, but when I access at outside, I didn't face this problem at all.
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Sep 18, 2010
I've been running an Ubuntu VM (10.04 LTS) on my Win7 (Home Premium 64bit) desktop successfully for several months now using VMPlayer (v3.1.1). My problem began when I booted up the VM today - my wife decided to reboot the PC without gracefully closing down my applications when Windows told her that she needed to reboot to complete security updates.
When I booted up the VM, the Ubuntu desktop went right back to the exact same state that it was in before the host reboot - the same programs were open, I didn't need to log in, etc. However... I now have no networking. The network icon (NetworkManager Applet 0. shows the red exclamation point. If I click on Auto eth0, it attempts to connect for a bit, and then says "offline".
My VMware Player settings for this VM are configured for bridged networking, and the "network adapter" icon shows online. If I go into the VMWare Player settings and change the networking to NAT, and then click on Auto eth0 again, the networking comes online. However, I don't want NAT - I want this Ubuntu client exposed to my network with it's own IP address.
At this point, I'm really not sure if the problem is within Ubuntu or within VMWare Player, or something on my Win7 host. I have zero skill at troubleshooting within Ubuntu - still fairly new to the linux scene. My Windows firewall is turned off. DHCP is enabled on my network, and the router is available.
Any ideas on how I might further troubleshoot this problem?
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Oct 12, 2010
Ever since I upgraded to 10.10 (via update, not from scratch), Thunderbird suddenly ramps up CPU usage within the 10 seconds of being started. No add-ons are enabled. Anyone have this problem or can help me troubleshoot?
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Dec 8, 2010
After updating recently VLC does not play audio or video, and it does not complain about not being able to do so, even when running from terminal.
The version is VLC media player 1.0.6 Goldeneye.
I have tried resetting the preferences.
I don't know how to troubleshoot any further..
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