Linux on Android is an ongoing project that attempts to slot the Linux operating system to Android. It consist of an installer that installs a complete Linux system distribution on an Android system without removing Os from it. Once you have the distro up and running you can pretty much run and install any Linux system software you like, provided there is an ARM slot or the application is not architecturally dependent.
The project currently has specialist for Debian, Ubuntu and Backtrack. You can expect to see some Linux system submission, probably some lightweight ones, later on. There is a no cost app for each Linux system distro and a compensated app for Ubuntu and Backtrack (each priced at £0.99) and a Complete paid app (£2) which features all reinforced distros and will always consist of any upcoming distros. The no cost applications consist of everything you need but the paid applications consist of a one click boot feature and quicker downloading.
To run Linux on Android you need a reasonable phone with at least a 1GHz bprocesser, a lot of RAM and 300MB of free space.