Ubuntu Servers :: SSH Freezing After Kernel Update ?
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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Aug 15, 2010
Today when I logged into my fileserver it told me there were 20 updates available. I went ahead and installed them, one was a new kernel. After reboot, I cannot see that machine when I browse the network. It still has the same static IP and I can still map to the shared drives, so Samba is working. When I browse the network from Windows or my WDTV Live media play it no longer shows the server by name. The smb.conf file is still intact and I restarted Samba. Not really sure where to start troubleshooting why I can't browse to it.
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Jun 4, 2010
I have big problem with my network router with linux freezing.
Motherboard: Intel S5520HC
CPU: 2x Intel Xeon E5520 2.27GHz
router:~# cat /proc/version Linux version 2.6.26.1 (root@debian) (gcc version 4.1.2 20061115 (prerelease) (Debian 4.1.1-21)) #1 SMP Fri Oct 10 03:51:09 CEST 2008
Avarage utilization only 2-4%. Router performing routing, DHCP server, NAT and shaping for 1000 IP addresses (avg. bandwidth 100Mbps)
This PC freezing once every 2-3 days.
Nothing special in remote syslog but I have bad feelings that the router's time stops before freeze. With cron I ssh (3 times) to router every whole minute and syslog before freeze looks like this:
And freeze. Falling to silicon heaven.
This is monitor print-screen:
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Sep 15, 2010
I have Opensuse 11.3 with kernel 2.6.34.4-0.1-default i686 and use KDE4-4.5.1 from the new OpenSuse repo. My system sometimes freezes while using Firefox or Chrome and also sometimes playing with Kpatience or browsing images with Gwenview.
My video card is an old Sapphire Radeon working with radeon module and desktop effects are off. The only way to bring up the system is hard resetting. I tried also the desktop kernel with no difference.
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Feb 15, 2010
Trying to install Opensuse 11.2 (64bit) on a new machine isn't working well. After loading the linux kernel, the green screen with the progress bar appears, and the mouse and keyboard turn off (at least, the leds go out and there's no response) The progress bar never moves. Esc key doesn't work either. I've tried safe mode install and other options, but the same result follows.
It's going onto a Tyan S2912 with AMD 2347HE. The hard drive is a Western Digital SATA drive I bought today. There's 4GB of RAM, and the DVD drive is a Toshiba USB unit. I don't know what else to say about it. If it helps, I've been running Pelican HPC (live) without a hard-drive andgot tired of setting the network configuration and installing a ouple of programs with every boot. (Which is why I bought the hard drive today). I want to install Opensuse 11.2, but I've tried Debian (no luck on detecting the hard-drive) and Windows 7 (installed fine, but there are no drivers for the embedded video).
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Jan 28, 2010
After migrating from openSUSE-11.1 to openSUSE-11.2 together with a few further online updates including a kernel upgrade to 2.6.31.8-0.1-desktop, my system started freezing a couple of times for two days.
I made up my mind googling for "linux freeze", found a hint saying, that 2.6.31.8 causes trouble, fell back to 2.6.31.5-0.1-desktop, and voila: the problem is gone. What a relief!
The following describes my system:
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Feb 5, 2011
We have just installed the 11.3 version of opensuse in a Dell Poweredge T610 with 8 Gb in RAM and two (2) Xeon Quadcore proccesors. Well, the first time the Opensuse resets the computer, after the installation (it was fine, w/o any problem) the system goes frezze showing a screen which reports a BUG ERROR in the Kernel code, specifically:
Kernel bug at /usr/package/BUILD/kernel-desktop-2.6.34/kernel/timer.c:643
invalid opcode: 0000 [#1] PREEMPT SMP
last sysfs file: /sys/module/thermal_sys/sections/__ksymtab_strings
CPU 11
...
...
After a "button off" reset the machine boots fine and we could finish the configuration of the applications that we needed. We tested the machine by two days and it didn't show again the problem mentioned, and we believe it was a little bug in the installation, but today, the server halts again in the boot process 3 (three) times before it runs again well.We have repeated this installation in other computers, one in a 32 bit version and other in 64 bits version (like the Dell) and only in the last one has repeated the problem, I mean, no problems in the 32 bit installation. Fortunately, this new server is just a replacement for an old machine, that is running with the 10.3 version. Perhaps, does we continue using the 10.3 instead of the 11.3 meanwhile it is deputed?
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Apr 18, 2011
I had a server running Centos 5.5, which i have Webmin installed.. The other day i saw that there were updates available so i installed them, and now i have Centos 5.6 installed. I just had to reboot my server to move it, and now it wont boot. It is freezing at "Starting xend:"
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Jun 14, 2010
I had Ubuntu working perfectly until I installed updates for the proprietary Nvidia drivers.Now Ubuntu freezes at the Ubuntu loading screen. Im using Ubuntu 10.04 64bit.I used to know how to access the terminal at bootup but I no longer remember.
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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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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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Nov 26, 2010
Is there a way to get the matching Linux kernel headers automatic on a regular kernel update via the Ubuntu packed manager? Every time I get a new kernel I must do an aptitude install linux-headers-`uname -r`
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Jan 6, 2010
I'm running Virtualbox from the Sun website (need the USB support) and it breaks after each kernel update.The problem is that I installed a lot of Ubuntu systems for transitioning windows users with Windows in virtualbox to ease the migration but I have to rerun vboxdrv setup after each kernel patch.
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Jan 7, 2010
At the moment I am using kernel 2.6.31-14-generic. I'm not one of those people who needs to have the latest and greatest kernel to be happy, I just rely on the update manager. I swore that I saw an update for a new kernel, but my kernel version hasn't changed. I'm just curious if there was a new kernel that was released or if that was just an update to the kernel listed above.
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Feb 5, 2010
9.04 this morning updated my kernel to I believe it is 2.6.28.18 and upon the reboot I had no desktop. It booted wanting to go into low graphics.
So I drop to shell and stop the gdm and try to run the latest nvidia run file I have and it hangs saying I have a x server running.
Otherwise I am needing assistance with getting my desktop back! I can boot into an older kernel and if need be I would like to roll back that latest update this morning, but once again I am forgetting the command line for that.
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Dec 1, 2010
Ran the updater, went to boot to Win7 to use Photoshop and realized that the grub menu was gone. Ubuntu boots by default now. I tried running "sudo update-grub" at a virtual terminal and while it listed the various linux kernels ok, it then got caught in a loop spitting out some crazy looking errors. I rebooted and Ubuntu came up fine. I tried running "sudo update-grub" again from the gnome terminal and it hangs the whole computer for a few minutes and finally gives me this:
[Code]...
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May 13, 2011
I am using DEBIAN 6.0 and I wannna update my kernel from 2.6.32 to 2.6.38. Every time, I do it but after the installation & rebooting into the new kernel it gives me error "UNABLE TO BOOT INTO THE KERNEL".
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Dec 31, 2008
I have the following strange thing with a RHEL4 installation. Since last week, the system did a reboot and now something is really fucked up. During boot we get the following messages (don't care about 'strange' typo's, my colleague typed it 'blind' from the screen)
Code:
The strange thing is that we never see a 'could not mount blabla' or similar messages. First we thought it was a failing kernel update by plesk, but even after manually updating the kernel with RHN RPM's, still the same message. Booting with rescue mode and then chroot the system works. After that we even can start things like plesk and so on.
We double checked things with another RHEL4 install, and at least two things were odd:
1: the working machine has /dev/dm-0 and /dev/dm-1, the broken one doesn't
2: some files on /dev didn't have group root, but 252
We tried to recreate the /dev/dm-X nodes with [vgmknodes -v], output:
Code:
A fdisk /dev/sda shows: /dev/sda2 XX XXX XXXXX Linux LVM (I removed the numbers because this line is from another machine, but rest was identical)
We have a copy of the boot partition so if one need more info please let me know.
grub.conf:
Code:
last part of init extracted from initrd-2.6.9-78.0.8.ELsmp.img:
Code:
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Sep 1, 2011
(after i update packages, it says error, and here's whats in the details tab)
Preconfiguring packages ...
(Reading database ... 197969 files and directories currently installed.)
Preparing to replace flashplugin-installer 10.3.181.34ubuntu0.11.04.1 (using .../flashplugin-installer_10.3.181.34ubuntu0.11.04.1_i386.deb) ...
code....
How to fix This? i haven't messed with Ubuntu much...Why am i getting an error about a kernel update?
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Mar 24, 2010
A recent kernel update seems to have misplaced the Kernel Headers. VMWare needs these headers and cannot find them. Attempting to run VMWARE gets the message: Kernel headers for version 2.6.31.12-0.2-desktop were not found.
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Sep 27, 2009
after update to kernel-2.6.18-164.el5 one of the 2 NIC's of my machine are only found at 1 of 4 reboots. Using the old one kernel-2.6.18-128.7.1.el5 all is fine. This are the to NIC's:
00:0a.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+ (rev 10)
00:0b.0 Ethernet controller: Intel Corporation 82557/8/9/0/1 Ethernet Pro 100 (rev 0c)
And the Intel one, makes the problems with the new kernel.
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May 29, 2010
The server runs# uname -r2.6.18-128.4.1.el5However, today I executed yum update kernel*due to security advisory. I was just about to reboot the system when I realized that it runs VMWare Server Instance that will most likely fail to restart after kernel upgrade (I had a hard time fixing it after previous kernel update). Now I want to keep 2.6.18-128.4.1.el5 after reboot.I see that new kernel is scheduled for booting:
# cat /etc/grub.conf
default=0
timeout=20
[code]....
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Jul 18, 2010
From F12 to F13. Is there anything I should remove before updating? I have few programs isntalled from source/binary installers in /usr for example. Would it cause problems?
And is there any chance to be able to switch from a 32 bit kernel to 64 bit kernel during the update? The hardware is capable of this.
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Feb 5, 2010
I received an update to my kernel through the update manager (updated from ****.32.14 to ****.32.19, or something like that) but grub still shows the old kernel and not the updated one. Was this not a full kernel update and only a patch or do I have to do something to use the new kernel? I'm new bear with me if this doesn't make any sense.
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Aug 21, 2010
I have Ubuntu Karmic 64-bit installed. Update manager tells me there are updates available, but when i try to install them, downloading the updates fail and throws this error:
Code:
Failed to fetch http://security.ubuntu.com/ubuntu/pool/main/e/eglibc/libc6-i386_2.10.1-0ubuntu16_amd64.deb
Consequently, a similar error occurs when I try installing Sun Java 6 Runtime.
Code:
Failed to fetch http://archive.ubuntu.com/ubuntu/pool/multiverse/s/sun-java6/sun-java6-jre_6-15-1_all.deb Connection failed [IP: 91.189.88.31 80]
Ubuntu Restricted Extras stalls when it's time to download the Java package I tried synaptic, update manager, aptitude, apt-get, and they all throw similar errors. Then I also tried connecting to different servers, to no avail. So to check if it's my connection to the net that has problems somehow, I tried downloading the file directly through my web browser, and it works. (But it's not recommended, and it won't let me!, install the updates manually, right?) I tried searching for the errors on the net and in the forums, and they're all somehow related to proxy servers. I then checked if I'm using some inappropriate proxy settings, and everywhere it's all set up to connect to the net directly, which is, well, my setup.
Take note though, that I am able to install other softwares normally, i.e, using synaptic, apt-get etc. The ones I tried include Pidgin and Mplayer. It's just these updates and Java:
Code:
jeanne@jeanne-desktop:~$ sudo sudo aptitude upgrade
W: The "upgrade" command is deprecated; use "safe-upgrade" instead.
Reading package lists... Done
[code].....
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Feb 11, 2011
I was running 10.04 LTS and had decided to stick to the LTS versions as I'm now running my machine as a server and don't want to be updating regularly.Every time I logged in via SSH I got a message telling me there where packages to update including a security update. So I did a search to find out how to perform an update on Ubuntu server from the command line.What I found was to do this:sudo apt-get updatesudo apt-get dist-upgradeAfter doing that I rebooted but now my machine gives me this message:
init: ureadahead-other main process (794) terminated with status 4Your disk drives are being checked for errors, this may take some timePress C to cancel all checks currently inprogressI'm not pressing C yet and leaving it alone to finish, but I noticed when the machine booted that one of the options for booting talked about Ubuntu 10.10, so I'm worried that I've updated from 10.04 LTS to 10.10 by accident?
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Apr 19, 2009
I've install F10 to use it as server and router and found a strange problem on my XP machine which is behind the F10. I've tried to update my Lineage2 client from official server but the update crash, tried to open the web page it didn't open. Also tried to open microsoft web it didn't open. When i try to open the same pages on PC with F10 they open with no problem.
[Code]...
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Dec 16, 2010
Problem with my Internet connection. I can't connect to the update servers. I don't know why. It's a brand new installation, not a week old yet. I can't install the support for restricted media for example. The servers won't refresh in YaST. It tells me it can't download the repomd.xml.asc.
The other problem is that some servers on the web won't load for me either.
For example, I get most of my local news from The Toronto Star, and I can't connect to it's website at all.
I can from Windows (I dual boot) but not SUSE. I don't think its a problem limited to that one website either. I am able to connect to most websites though.
This is the result of zypper repos -d
Code:
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Jan 18, 2010
If I want to just install Linux kernel for educational objects on a fresh computer, should I first install one of Linux distribution and then update it's kernel or I can just install kernel itself?
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Aug 25, 2010
I am using Ubuntu 9.10. I use a Huawei EC1260 modem, which fails to work (but can be made to work by typing some commands). The current version of kernel on 9.10 is 2.6.31-14-generic. An upgrade to 2.6.31-22-generic worsened the matter and even broke the workarounds that I used for the modem.
I want to upgrade to the kernel to that of 10.04 to resolve this (I will not upgrade to Lucid as there the experience is painful - it hangs most of the time and I do not have time to fix things). Or, maybe, a downgrade to 2.6.28-11 (the kernel of Jaunty)?
How will I do this? Is there any adverse effect that may occur due to the update?
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