Ubuntu: Removing all legacy unused kernels

Sometimes you need to care about each MB of disk space. You are starting to cleanup drives, but there's nothing obviously can be deleted. In such cases you an free-up some space (from dozens to hundreds of MB) by removing all legacy system kernels.
In such case please make sure you are running the latest kernel version
Compare outputs for

uname -r

and

dpkg -l | grep linux-image

Probably you may need to reboot! Then just issue the following command:

dpkg -l 'linux-*' | sed '/^ii/!d;/'"$(uname -r | sed "s/\(.*\)-\([^0-9]\+\)/\1/")"'/d;s/^[^ ]* [^ ]* \([^ ]*\).*/\1/;/[0-9]/!d' | xargs sudo apt-get purge

References:
http://ubuntugenius.wordpress.com/2011/01/08/ubuntu-cleanup-how-to-remove-all-unused-linux-kernel-headers-images-and-modules/

Run Chrome as root on Ubuntu

For some task you have to root on a system and some such tasks are made from browser.
If you use Google Chrome here is a simple way to lauch it as a root:

sudo -i
/opt/google/chrome/google-chrome --user-data-dir %U

Reference
http://ubuntuforums.org/showthread.php?t=1743565

Install Java on Ubuntu server 12.04

How to install Java on your Ubuntu server 12.04?
Follow this easy 3-step guide:

sudo add-apt-repository ppa:webupd8team/java
sudo apt-get update
sudo apt-get install oracle-java7-installer

Now you can enjoy Java on your Ubuntu ;)

References:
http://askubuntu.com/questions/197248/java-on-ubuntu-server-12-04

Найкращий IM для *nix: qutIM

qutIM - одна з тих програм, що радують постійно)

Для встановлення його в моїй домашній Ubuntu 9.10 використав офсайт проекту.