Ubuntu Servers :: How Long Has Your Server Ran Without Crashing
Jan 10, 2011
I have a few headless servers running in my home office and I can easily see how these machines could get lost or forgotten. Linux is such a beautiful operating system it often puzzles me why it isn't more popular. People say that Linux isn't user friendly, but honestly I think it's more user friendly than Windows. If you took two people who have never used a computer before and sat one down in front of a computer running Linux and the other person in front of a computer using Windows, I'd like to believe that the person using the Linux computer would excel much quicker.
Anyway, if you have a server running out of your home, or office, how long has your server ran without it crashing? Secondly, compare that figure against how long a computer running Microsoft has run without crashing or forcing a restart.
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Jun 8, 2011
we are setuping high-performance web farm with 4 ubuntu servers (all 10.14 LTS 64bit, i5Core CPU, 16GB Ram). One server is "database" server with mysql installed, three servers are "webservers" with tomcat installed. All three webservers have public IP and are connected directly to internet by eth0 (onboard network card) and are connected to switch that is connected to database server by eth1 (pci network card). All servers has stardard instalation with no special modules/programes installed.
Web servers are already under load, but only on about 10 requests/minute. After several hours in production, strange thing happened - one of the web servers (each time another one, so it is happening to all of them but not at once) starts to have pings to database (that is connected directly on LAN) = 100ms (other two servers still has like 0,02ms). Pings stay high until we do /etc/init.d/networking restart, after that it is fixed and pins are again low again. Another strange think is, that when we let ping running for some time, it is slowly dropping from 100ms to 1 ms and then again jumps to 100ms (exactly to 100ms always) and again starts dropping - so it is cycling over and over again (one cycle takes about 2 minutes).
We were trying reconfigure network, play with switch (the same situation was happening even without switch when there was only one webserver and one database server directly connected), disable IPv6 but nothing helped. The only thing that we discovered is that it has to be caused by network configuration.Do you have any idea what can cause it? We went through systems logs but found nothing suspicious (at least according to our understanding).
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Jul 5, 2011
I am following this howto to install Apache, MySQL, and PHP5:
[URL]
I have just installed Apache and I am pointing my browser to:
http://192.168.0.100
but I am getting the error message that the server is taking too long to respond.
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Jan 9, 2010
just start Ubuntu 9.04 said: File system chek failed a long is beging saved /var/long/fsck/checkfs if that location is writable Please repair the file systmen manually A maintenance shell will now be started Ctr+ D terminate this shell and resume system boot. Give root password for maintenance or type Control +D to continue. I did Ctr+D , and after login said , that can not find /home. I starte with the live cd:
[Code]....
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Jul 16, 2010
I have a cron job to start spideroak when the server boots code...
Command line arguments not allowed during New User Setup
Interestingly enough.... the line saying "Command line arguments not allowed during new user setup" isn't from my script. Any chance that has something to do with it?
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Apr 12, 2010
I'm running Ubuntu 9.10 on a VPS with linode.I run around 10 sites from this vps and whenever I try to do anything thats related at all to email (such as user registration, contact form submission) the process itself can take anywhere from one to five minutes. I realize that this is most likely due to a misconfiguration with how my email has been set up.
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Feb 17, 2011
I've set up a cups printing server using ubuntu 10.04.1 LTS. The printer's a HP Laser Jet 1018 I can connect to it over vpn using openvpn from my netbook which is also running ubuntu 10.04.1. I can connect to the printer all right and test page prints without a problem. But if I try to print anything else, it take at least 5 minutes before the job is successfully send and printed out.
Also, on the client side, for example, the file size would like 500k, and when it finally prints out, the file size on the server side is less than 10k. The file is a black and white document, and from what I can tell, the printed page is not missing any information.
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Feb 20, 2010
I have Fedora installed on a netbook. I customarily mount several NFS shares on this machine, from both a desktop system running F11 and a small server running FreeBSD. On the server side the shares are write-enabled. On the server side the shares are write-enabled. In the past this has worked fine.
However since upgrading to F12, my configuration no longer works as before. Reading from the NFS shares is no problem, but as soon as I try to write to one, either in Nautilus or from any other program, including on the cmd line, all hell breaks lose. Nautilus crashes, and I am unable to remount the shares. Usually rebooting the client is the my only recourse.
There are no clues in dmesg on either the client or the server. In terminal trying to remount a "trashed" share I see this:
Code:
$ sudo mount -v venus:/media/disk8 /media./disk8
mount: no type was given - I'll assume nfs because of the colon
mount.nfs: timeout set for Sat Feb 20 17:34:59 2010
mount.nfs: prog 100003, trying vers=3, prot=6
[Code].....
The NFS versions under F11, F12, and FreeBSD are the current ones (all updates applied).
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Jan 19, 2011
LDAP Server => CentOS 5.5 Configured according to this link [url]
LDAP Client => Fedora 14 Configured according to this link [url]
Now after I reboot the Fedora14 during startup, it takes very very long time to start up the mdmonitor service.
After that when I log on using a local account in the Fedora14 machine, it takes painfully long time to log on. And it does not identify the domain user.
I can able to log on to the ldap server through ssh from the Fedora machine.
I issued the command 'getent passwd' which does not fetch the domain users either. I am completely lost now.
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Apr 8, 2010
How long normaly keep the mail server send mails on the outbox queue and try to send? What about hotmail, gmx and gmail mail server?
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Feb 25, 2011
I'm currently running LAMP on an Amazon instance. The OS is from the Amazon 64 bit image.
Basically, every so often MySQL seems to go down. All of my sites fail to connect to their databases. I then have to SSH in and restart mysqld.
Heres the last 30 lines of /var/log/mysqld.log code...
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Feb 20, 2010
For quite some time now, firefox has been crashing randomly. At first I thought it was the flash plugin, which was actually part of the program, but then I renamed the whole .mozilla/firefox directory, thus causing it to start fresh with no plugins or extensions. Firefox continued to crash, and in fact, now it seems worse. Now it will crash normally within about 2 minutes of having been started, and it will crash even if I don't do anything. If I just start it and leave it on the firefox start page, it will crash.
If I run it from the command line, I get this error when it crashes:
Code:
I am using X.org version 1.4.0.90.
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May 2, 2011
I am getting below information from the core file on our production servers. one of our server is crashing with segmentation fault .Program terminated with signal 11, Segmentation fault.
#0 0x00b24332 in _int_malloc () from /lib/libc.so.6
(gdb) where
#0 0x00b24332 in _int_malloc () from /lib/libc.so.6
[code]....
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May 18, 2009
I'm using Centos 5.3 with xen to virtualize some virtual machines (mostly windows 2003).
It works perfectly fine excepted one thing :
Each monday morning, the server is crashed with nothing noticeable in the logs that help.
Since it allways happen between sunday 22h00 and monday 05h00, I suspect a crash when running some cron tasks...
The server works fine. I look at cron.weekly and deactivated makewhatis.com which is the only task apart 0anacron...
But it makes no difference.
I really don't see what can cause such a regular failure... As I am more specialist on Debian, there may be some specific tasks running every week on centos I didn't noticed.
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Jun 10, 2010
I am backing up data from a remote server onto a local ntfs partition. It seems that the rm -rf and cp -a commands are taking a long time to complete in what should be short, incremental backups.Has anyone had similar problems when backing up to an ntfs partitionHere is my rsnapshot.conf:
Code:
#################################################
# rsnapshot.conf - rsnapshot configuration file #
[code]....
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May 27, 2010
I am using KVM and created four guest Operating systems on it.The server host is Ubuntu 10.04.I am using 4 websites in a reverse proxy environment.One of our website is running on CentOS VM.Right now there is no traffic on the website static HTML pages.I do not have any clue as why it was taking longer time to be accessed.
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Jan 7, 2011
I have recently make a website. When I enter to it by http://localhost it works fine, but when I enter by my IP, nothing apears. Firefox told me that the server takes too long to respond.
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Feb 11, 2010
I have a VPS running a web application served using Apache, that on average deals with 20-50 requests per second. It's usually above this point (50 requests per second) that the amount of memory that Apache uses is too high for the VPS and errors start occuring - web pages crash and VPS falls over for a minute or two before going back to normal levels.
I believe that MaxClients is the best way to reduce the amount of RAM that Apache uses and I am planning to reduce MaxClients from 256 (default value) to around 100. Each Apache process uses ~15MB and the server has 1900MB of ram in total - the server does nothing else other than run Apache and a few crons.
Current setting are:
Code:
KeepAlive On
MaxKeepAliveRequests 100
KeepAliveTimeout 3
# prefork MPM
# StartServers: number of server processes to start
[Code].....
I tried reducing MaxClients before which lead to massive slowness, so I need some other options as well.
Does my suggestion of reducing MaxClients to ~100 seems sensible? What are my options if the server experiences slowness again - optimise the application? What's the best way to reduce memory usage - move images to another web server?
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Dec 21, 2009
I've got this issue for past week.
Mysql Crashes with 111 error although it starts back up instantly.
but i can't seem to figure out why.
-Server Is Deb. Lenny + Direct Admin.
Quad Core 2.5, 8GB Ram.
-Mysql ver 5.3
-Htop shows mysql is most of the time using 33 - 50% CPU.
(the init.d name is /etc/init.d/mysqld )
-This is from the err log of last crash. code...
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Oct 4, 2010
i installed a new centos 5.5 1 old server hp ml380 g3 series on 2gb ram, 72gb raid 1+0 scsi disk
after running 1 sucessfull day next morning i found no response of ping, telnet, putty, ssh. when i check physically machine the mouse keyboard was hang, i reboot machine, then it says kernel panic failure mounting hardware, then next time i reboot the o/s centos start book properly and running. i check the dmesg logs, can someone guide me how to check cpu,raidcontroller,memory,harddrive are getting failed or what hardware exactly choking out.
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Mar 1, 2011
I'm running Redhat 5 which is running as an email server with Lotus Domino 8.5. Its a VM on ESX 3.5. The server was running out of space to so I added a new hardrive and mounted it to /domino/mail2, everything was fine for a couple of days, but then the machine became unresponsive, I couldn't even see anything on the console screen so I rebooted, it then did a file check and everything came up fine. This has now happened 2 more times over the past few days, I haven't seen any evidence that the extra disk is the problem but if I can't find anything else I will remove it and see if the problem goes away. There isn't really a consistent time it occurs.
Here's the output of the logs from the last time it happened if anybody who know more about this stuff then me ( which isn't a lot) wants to take a quick look as see if the problem is obvious or what I could be trying.
Mar 2 00:17:30 DOM2 kernel: mptscsih: ioc0: attempting task abort! (sc=ce6afbc0)
Mar 2 00:17:30 DOM2 kernel: sd 0:0:0:0:
Mar 2 00:17:30 DOM2 kernel: command: Write(10): 2a 00 01 3c 8c eb 00 00 08 00
Mar 2 00:17:30 DOM2 kernel: mptscsih: ioc0: task abort: SUCCESS (sc=ce6afbc0)
[Code].....
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Jul 22, 2011
I have SLES10-SP3 running on an Intel SR1600URHS board with 3 hot-swap SATA disks configured using mdadm as Raid1 with hot spare. If I pull one of the active disks, all file i/o will stop for about 2.5 minutes after which it will start again and the raid array will be rebuilt using the spare disk. Is there any way I can reduce this 2.5 minutes of inactivity? I've tried setting /sys/block/sdX/device/timeout and /sys/block/sdX/device/retries to 1 for all disks, but this hasn't made any difference. The output from messages is:
12:11:56: ata2.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen
12:11:56: ata2.00: cmd ea/00:00:00:00:00/00:00:00:00:00/a0 tag 0 cdb 0x1e data 0
12:11:56: res 40/00:03:00:00:20/00:00:00:00:00/b0 Emask 0x4 (timeout)
[code]....
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Aug 12, 2009
I recently installed Fedora 11 on my machine, the configuration of which is: Intel Core i7 920 CPU, 3 GB DDR3 SDRAM, nVidia GTX295 Graphics Card. I initially used the default kmod-nvidia driver, but with a yum update, somehow a non-PAE kernel got installed and the kmod-nvidia driver did not get installed with it during the update for some reason. So I uninstalled the PAE kernel and associated kmod drivers, and downloaded the nVidia driver from the nVidia website. It ran just fine for a few days, and then all of a sudden, after a reboot, the X Server crashed and I had to log into the text mode, run
Code: setup and do the default X configuration. Then, I re-installed kmod-nvidia, with no luck. Sorry for being so vague about this, but I finally managed to get the CUDA driver (I need to use CUDA for my project work) to work (downloaded from [URL]). But after one reboot, the same problem resurfaced.
Now, I am in X Windows with a default 800x600 configuration using a generic visa driver, on a 23" monitor I have been rebooting my computer all morning and trying various things to get the driver to work again. I would be happy to furnish any details about the installed packages I have. For now, here is some information.
[Code]....
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Aug 19, 2009
I've setup vsftpd correctly and it's running fine with local users (in the same LAN). However, when remote users wanna login to the server, it takes more than 1 minute to get in. Users do can login from remote. It just took too long. (It prompted for the username and password very fast.) Since the server is behind a router, I did configure the port forwarding for TCP 20-21. The centos version is 5.3. The vsftpd is v2.0.5.
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Jan 12, 2011
Running Squid version 2.6.STABLE21 on CentOS5 release 5.5 (Final) in non transparent mode. All the browsers are configured to connect to the squid on the said port. And that is working fine in conjunction with dansguardian.I want to integrate ncsa_auth basic authentication mechanism into squid. And the error is what is mentioned in the thread title.
Here is cache.out file contents:
Code:
2011/01/12 18:16:14| Starting Squid Cache version 2.6.STABLE21 for i686-redhat-linux-gnu...
2011/01/12 18:16:14| Process ID 29318
2011/01/12 18:16:14| With 1024 file descriptors available
2011/01/12 18:16:14| Using epoll for the IO loop
2011/01/12 18:16:14| DNS Socket created at 0.0.0.0, port 52054, FD 6
[code]....
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May 27, 2010
I am using KVM and created four guest Operating systems on it. The server host is Ubuntu 10.04.I am using 4 websites in a reverse proxy environment. One of our website is running on CentOS VM. Right now there is no traffic on the website static HTML pages. I do not have any clue as why it was taking longer time to be accessed.
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Oct 13, 2009
I am running Centos 5.3. I ran no updates, performed no installs, nor changed any configuration immediately prior to this issue. My problem is this: when I run the command startx (default runlevel 3), it is a long time (5-10 minutes) before Gnome startx, and once it does start applications will not run. Also, when I try to use sudo (from any environment, even ssh), it is a long time (5-10) before the command is executed.
I cannot say for sure, but it seems like this is an intermittent problem. Sometimes X takes a long time to start, but once it starts it will launch programs. Sometimes X takes a long time to launch, but once it starts it will only launch certain programs. Though presently X always takes a long time to start, and I cannot successfully launch any programs.
A while back a had a similar problem to this (x taking long time to start, sudo taking long time to execute) and it ended up being a DNS problem. Unfortunately, I cannot remember exactly what it was and I stupidly did not document it. Maybe this is also DNS related, I don't know.
I don't know what log files to look at for problems with X, Gnome, and sudo taking a long time to start.
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Mar 22, 2011
How long does hardware Raid card (raid 1, 2 drives)take to mirror a 1 TB drive (500gb used)?Is there a general rule of thumb for this?4 hours? 12 hours? 24 hours?
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Mar 15, 2011
I'm having a very strange problem with red hat cluster. After testing it in the lab, I tried to install a new cluster and received the following error: cman not started: Cannot start, cluster name is too long or other CCS error /usr/sbin/cman_tool: aisexec daemon didn't start I've checked the internet for that error, but nothing. I decided to to take the example from cluster.conf man, which looks like that :
[Code]...
And still I get the same error. I can find my servers both from DNS (FQDN and short name) and they also appear in /etc/hosts.
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May 10, 2010
i found this video, and i really want to do the same. *newbie needs to learn [URL]...my question is, what need to be installed and how?
is there any specific configuration to make it works?
and will it work if i want to connect from Ubuntu to Fedora ?
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