Installing AVR environment on Linux is very hard. Firstly you need to download source code of all the tools, then install additional necessary libraries and compile everything which can take a lot of time ...

On Ubuntu it's easy, you just need to install 3 programs with apt-get command.

1. Open Terminal

2. Copy-Paste into Terminal:

sudo apt-get install gcc-avr avr-libc avrdude

3. Type your root password

4. Press Enter and press "Y" a few times when it's required

Terminal commands for using this tools are the same as for Mac and even Windows if you are using Win-GCC port. More about that commands next time ...

Presentation about why Linux sucks: http://www.hardocp.com/news.html?news=MzkzMjUsLCxoZW50aHVzaWFzdCwsLDE=

I mostly agree with him. But Linux is still cool and good operation system for using (excluding for electronics work, CAD, ...).