Ctrl+C – halts the current command
Ctrl+Z – stops the current command, resume with fg in the foreground or bg in the background
Ctrl+D – log out of current session, similar to exit

Ctrl+W – erases one word in the current line
Ctrl+U – erases the whole line

Ctrl+R – type to bring up a recent command
!! - repeats the last command
exit – log out of current session