Question: how to install qiime on ubuntu?
Answer: Install Ubuntu 11.10 or 12.04 in your preferred way.
Uncomment the universe and multiverse repositories from /etc/apt/sources. list, you can use your favorite text editor but we suggest pico for simplicity. ... 
Install the building dependencies in your machine. This step requires admin (sudo) access. ... 
Happy QIIME-ing!