For those of you who like to use the command line (Linux users especially), be sure to make good use of the arrow keys to quickly browse through your prior commands. The up and down keys will show you the entries you have run previous (for those times you mistype something or need to run the same command on several files) and the left and right keys scroll through a previous command one letter at a time.

Try it, because once you start use them, you can’t live without them.