I have full bash shell running, can learn python or perl directly on the phone, have mapped keyboard and extra symbols in terminal to things I need to learn/use linux, and have fedora running in chroot on sd which enables me to practice redhat stuff such as apache in a safe environment.

If you really want linux in your pocket I am afraid you do not have that many choices.

In a nutshell I have 0 respect for Nokia now but love the device and this community is the best.