Typical Linux Shell Commands

Here are some commands that a typical UNIX shell provides and what they do:

logout: This tells the login shell to log you out of the system. After doing this, the computer will again display a login prompt and wait for the next user to log in. This only works within a login shell.
exit: This tells the shell to exit. If the shell is a login shell, it also tells it to log you out of the system. Otherwise, exiting a shell brings you back to the shell from which the one you are exiting was started (i.e. the previous shell).
cd directory: Change (move into) the directory directory. This makes directory the new current directory.