Shell Command Separators

The && Separator

command1 && command2

command2 is executed if, and only if, command1 returns an exit status of zero (success).

The ; Separator

command1; command2

Commands separated by a ; are executed sequentially; the shell waits for each command to terminate in turn. The return status is the exit status of the last command executed.

command2 is executed no matter command1's return status.

The || Separator

command1 || command2

command2 is executed only if command1 fails.