Ubuntu Servers :: Random Freezing On NIS/NFS Client Machines?
Aug 25, 2011
We administer a small lab of Ubuntu 11.04 machines. Users authenticate via NIS to the fileserver, which then uses NFS to mount their /home directory.
From time to time, seemingly at random, the machines will lock up. After about 15 minutes, they will go back to normal.
Switching the machine to the console with/ Ctrl+Alt+F1 doesn't help either - credentials get entered, but there's still a 15 minute wait before any commands can be entered. Some error messages show up at this point about processes that were running timing out. However, the root user can log in immediately (which makes us think that this is only affecting NIS accounts).
Logging in with the root account, we can ping our NIS server, and it responds normally. We can restart the networking and NIS daemons but neither of these help.
We checked the NIS error log in /var/yp/ypserv.log and it is empty.
We used to be running a different version of Ubuntu on the client machines (10.04 LTS), but not on the server.
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May 22, 2011
I am trying to build a file server with RAID 5 over a couple of 1TB HDDs, to serve about 10 client machines using Ubuntu Server. I already own a 22-port switch: HP ProCurve v1810G-24 Switch (J9450A), which I am assuming will do the job. And for the actual server I am thinking of buying: HP ProLiant DL120 1U. Will this hardware suffice, or am I missing something important to get the whole thing running?
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Jun 14, 2009
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Jan 4, 2010
Ever since I reinstalled Karmic Koala on this PC I've had a problem with random freezing. Initially I believed it to be an issue with my xorg.conf file, however, I disabled it and the crashing still persists..
Hardware:
Processor: Intel(R) Celeron(R) CPU 2.70GHz
Memory: 1GB
Graphics: 82845G/GL [Brookdale-G]/GE rev 01
For what it's worth, I use this same PC for windows XP and do not have this issue.
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Jul 6, 2011
Gotta rewrite everything i just wrote, because it actuall froze while i was typing this. Anyways, recently installed Ubuntu 11.04 and its had nasty freezing issues from the start. When it freezes, i cant move the mouse, none of the cap locks, number lock or scroll locks work. It will put any sounds playing into a small loop, and my mouse freezes. im forced to hard reset my computer everytime. Its 100% random too, not caused by a program, as far as i know.
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Feb 19, 2011
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Oct 13, 2010
I seem to be receiving the infamous random freezing issue on my Asus 1000HE. It's a stock install of 10.10 Desktop 32-bit with the only noticeable difference being a LUKS/LVM setup. Can anyone with a Asus 1000HE running a non-LUKS/LVM setup confirm this problem?
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Jun 11, 2010
I have to say I'm really enjoying it. However, when I have been watching videos on ..... and revision3.com after a random amount of time the computer will freeze up and I have to do a hard restart of the computer.I've gone through the multimedia sticky post at the top of these forums with no real luck.Oh just got the computer today as a real budget system.AMD Athlon II X3 435 2.9ghzMSI K9N2GM-FD AM2+on board NVIDIA Geforce 82004GB DDR2 memoryI'm using ubuntu 10.04 64bit version.
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Jul 17, 2010
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Jan 23, 2010
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Jun 14, 2011
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Feb 15, 2010
I just set up an ubuntu 9.10 server (no desktop environment, command line only) and I'm unable to see my samba share. I followed these instructions. Here are the relevant parts of my smb.conf file: Quote:
workgroup = JASONGROUP
# I un-commented this
security = user
[code]....
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Jun 20, 2009
i have problem in sending emails using outlook on my client machines i.e XP i am getting the error Relay access denied. i am using fedora 9 as our server. with dovecot and postfix and fetchmail.it was working fine previously .
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Aug 22, 2010
I need to implement AIDE on my client machines. The builds on these machine are different, so each workstation will have its own specific db generated through running AIDE initially. It is not good practice to just leave the db on the machine, since an "attacker" would be able to view this information. However, at the same time I do not want to pull back over 100 different aide db's to the ftp server and have an update pull each specifically every time I need to run the check. The plan is to leave the db on the client machine, but encrypt it (using public/private keys). I need to be able to encrypt the file on the client machine. I will use a cron on the client to pull an update (from my ftp server) that runs AIDE. This update needs to be able to decrypt the file, use it running AIDE, then re-encrypt the file on the client.
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May 25, 2011
I am looking for a version of vmware that manages 2 severs at the same time and that mirrors them such that if one goes down we can still work on the second and of course it also works as a backup. Also, must work on a ubuntu server I have looked but there are so many version that I don't know which one is the best.
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Feb 8, 2010
I am encountering this issue:
Samba login/passwd client : why the users id arent the same on every machines?
So the client side config looks like this:
Quote:
/etc/pam.d/ files :
Code:
returns:
Code:
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May 26, 2011
I have configured server ubuntu 11.04. Everything works fine, but there is a need for some clients to connect local hard drive. What should I do? How and what modules are added to the ltsp-image? How to register in the fstab on the client? Maybe I'm going the wrong way?
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Dec 15, 2010
I updated the kernel on a ubuntu machine yesterday. No problems so far. But after rebooting I couldn't login via SSH anymore. The session freezes right after authentication. Doesn't matter wether its pubkey or keyboard-interactive.
I couldn't find any hints so far. auth.log does not seem to show any warnings/errors.
Strange thing is: I'm able to log in via SFTP (SCP). I can even use WinSCP to open a "unix like" shell, but it only works for basic commands.
Here is the output of auth.log, when logging in via SFTP/SCP
Code:
This is the output when trying to open a real ssh session:
Code:
Ubuntu: Ubuntu 10.04.1 LTS
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Apr 5, 2010
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Aug 29, 2010
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Nov 6, 2010
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Jan 16, 2011
i want to start a home server in which i can log on to the same account form 2 or three different machines running ubuntu server. is it possible and if so, how?
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Feb 8, 2011
What i want to do is ssh to another machine and have gui interface as if i was using the other machine. anywhere from a single program like just nautilus run from the server on my machine to a desktop like i was sitting at it helps. Also being able to display something on the server would be nice.
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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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Mar 1, 2011
I discovered in running a script on a remote server. Take this little demonstration script:
[Code]...
This runs as expected (it does nothing) on both my local desktop and the remote server. However if I log in via ssh to the remote server and run this script everything on the server freezes. I do mean everything ftp/ssh/nfs/login-requests/... even if I go and physically plug in monitor and keyboard there is no response. It basically needs a full restart to clear. I have repeated this several times. Now something is clearly wrong here but does anyone know what. I didn't think a non-admin user should be able to actually lock up system processes.
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Jun 16, 2010
Having finally got Samba shares and printer shares working on my Lucid Lynx server, I've noticed that the throughput from/to those shares is very slow to what I was used to when I had those shares on a W2K server.Having Googled this problem, I noted that there was a known issue with this in Karmic (believe Brian Wu was looking at it). However, I don't see any results in Google as to this being a problem in Lucid.
I know ipv6 can cause a problem in this regard but having issued the command:
lsmod | grep inet6
I know that ipv6 is indeed disabled on my Lucid server. Any further information on whether the error reported in Karmic still applies in Lucid, and can this be addressed in any way?
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Jul 23, 2010
We got a new server with 2 network interface cards with 4 MAC addresses in total. We would like to run two virtual machines (vserver1 and vserver2); one should connect via eth1, the other via eth2, and the host (mainserver) via eth0. The content of /etc/network/interfaces is as follows:
[Code]....
A connection from mainserver to vserver1 or vserver2 is not possible; a ssh connection from mainserver to vserverx ends with a login to mainserver.
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Aug 24, 2010
I have a laptop and a Desktop both systems only used by myself behind a router. Ubuntu Lucid on both and 64 bit systems. I have installed NFS with the desktop as server and Laptop as client. The NFS only works with the firewalls (UFW) disabled on both machines. My current setup on the desktop ufw is
[Code]...
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Jan 10, 2011
I'm the proud owner of a new 1U server, thought dont really know how to handle the next problem. The server runs VMWare ESXi 4.x and currently contains two virtual machines with Ubuntu server 10.04 installed on them. Both the virual machines have 50GB of Harddrive, thought one had another 1TB to use.
One of these virtual machines is going to be a fileserver (and has the 1TB for that reason) while the other machine is purely going to be used as webserver. The system uses one harddiskdrive of 1.5TB (hardware raid 1 configured)
The fileserver will contain images, which should be shown on the webserver. Therefor I need to setup a link between the images directory on the fileserver, so it can be accessed by the webserver. Now this is one and the same harddisk, but the partition is only availeble in the fileserver.
How can i configure this directory, so it can be accessed by the webserver automatically (e.g. that I dont have to remount the directory, after the fileserver has been down for whatever reason)
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