[anonymous_chars]

These days I am using Ubuntu,I like it,I think it is so cool,but I have no idea about what I should study,I think I can learn emacs,Linux kernel,or something else,can anyone else give me a roadmap about learning Linux?
for example:
First, you should learn...
Second,you should learn...
Third,.....
and so on,

then I may have a clear mind to learn Linux to program,anyway,thank you very much.