read the manpages. Seriously. That, and do stuff that requires you to use the linux terminal. For example, instead of clicking and using the GUI to extract t

read the manpages. Seriously. That, and do stuff that requires you to use the linux terminal. For example, instead of clicking and using the GUI to extract tar files, try using `wget` and `tar`. then when you are more comfortable, try to do this in a pipeline.