The shell tips chapter provides handy tricks that you may wish to use when you are using a GNU/Linux shell (the command-line interface). This information includes handy shortcut key combinations, the shell's command history and information on virtual terminals.
|If you can't boot into your system|
If your having problems booting into your system you may like to use a shell so you can boot into your system and attempt to fix things up again.
To do this you need to pass the “init=/bin/sh” to your system before you boot up.
If you don't know how to do this please see Chapter 14, the technique is the same except this time you pass "init=bin/sh" rather than "single".