Right after a update of Ubuntu Server I faced that rsyslog used 100% CPU and that /var/log/syslog got filled up with following line, which was repeated almost every second:
[rsyslog] imklog: error reading kernel log - shutting down: Bad file descriptor
The problem is, that rsyslog tries to log kernel messages, which is as OpenVZ/Proxmox Container default not possible - to fix this, remove/comment out following line in the file /etc/rsyslog.conf (here already done):
During I was changing all ssl keys because of the heartbleed bug I thought it is a good time to enable PFS on my Debian 7 und Ubuntu 12.04 LTS servers (ECC keys and ECDH ciphers). Here is a step by step howto, when its not your first time to install something from source it shouldn't be that hard:
1. Preperation - download source and needed tools
Seeing an error message during a server upgrade is something you don't want to see - but it seems many people are hit by that Ubuntu bug. Seems my systems were hit because I use OpenVZ (or, better said, Proxmox) for virtualizing my servers.
In the bugreport comments #5 and #11 you'll find the solution: comment out kernel.kptr_restrict = 1 or (re)move the file /etc/sysctl.d/10-kernel-hardening.conf
Now the update process can complete :)
During the first two beta releases of Ubuntu 12.10 there was a lot of excitement, as the main lens of Unity suddenly showed not only your installed programs and files, there were also Amazon search results. Mark Shuttleworth answered within hours , but some people didn't understand it completely, they thought there will be no easy way to deactivate this new feature.
If you are sometimes installing custom ROMs and/or debug over USB, you had to install the full Android SDK manually or add a PPA. Now, on Ubuntu 12.10 thats much easier: In the Ubuntu Software Center are the two most needed tools - search for "Android", click on "technical items" on the left lower corner, and install "android-tools-adb" and "android-tools-fastboot".
Even faster with terminal:
The new version of GIMP didn't make it into the current Ubuntu LTS release, so here are some lines to install it (from an inofficial repo) easily:
sudo apt-get remove gimp sudo apt-get autoremove sudo add-apt-repository ppa:otto-kesselgulasch/gimp sudo apt-get update sudo apt-get install gimp
Then your installed GIMP can do YMCK, one-window-mode and much more :-)