The terminal is approachable and can be fun—practice shortcuts to make it your go-to over a GUI. Learn history, !!, Ctrl+R, tab completion, pwd, and cursor shortcuts to edit and reuse commands fast.

Delete Backs up to erase one character. Backspace Mapped as a backspace key, displaying ^H. Ctrl-u Erases the command line. Ctrl-w Erases the last word on the command line. Ctrl-s Stops flow of output ...

Unix permissions control who can read, write or execute a file. You can limit it to the owner of the file, the group that owns it or the entire world. For security reasons, files and directories ...