Ubuntu Tweak 0.4.9 has been released, a great application for tweaking settings in Ubuntu (Hardy, Intrepid, Jaunty or the latest development Karmic). From this version, Ubuntu Tweak has different package for i386 and amd64 and works for Karmic too.

Among the improvements and new features:

Next time you are faced with re-building your sources.list file in Ubuntu, visit the Ubuntu sources.list generator and populate your sources.list file.

Google’s Linux software repositories make it easier to download and stay up-to-date with current releases of Google Linux applications. Please choose one of the guides below to help configure your system to use these repositories.

First you need to edit /etc/apt/sources.list file

If you use the Ubuntu Personal Package Archives (https://launchpad.net/ubuntu/+ppas) then forget about opening /etc/apt/sources.list to add a repository; in Karmic, use the new add-apt-repository command. For example, to add the repository for the chromium browser...

The installation program on Ubuntu desktop is pretty basic. It lacks the other features, like support for LVM, RAID, and full disk encryption, that the Ubuntu text installer edition has. By default, it creates just one partition onto which it installs everything.

Follows the steps below to play DVD in your ubuntu 9.10 karmic Koala
1. Become root
$ sudo su -
2. Add medibuntu repositories to your sources.list.

addrepo is a simple command line interface for easily adding APT repositories to your sources.list

If you want add a ppa repository , you need to add some lines in /etc/apt/sources.list and also need to add the GPG key. I think it not easy for beginners. Now See a simple technique to add ppa with

After a discussion @ UDS-m, the blueprint for UNE default app selection was updated seconds ago and it now points out that some default applications might be changed in Ubuntu Netbook Edition 10.10.