The shell is your interface to UNIX.
If you make a bad mistake when you change your
or your password, it can be tough to log in and fix things.
Before you change your setup, it's a good idea to start a login
session to the same account from somewhere else.
Use that session for making your changes.
Log in again elsewhere to test your changes.
Don't have a terminal with multiple windows or another terminal
close to your desk?
You can get the same result by using
to log in to your host again from the same terminal.
What I mean is:
...Make edits to the file
...Logs you in to your same account
An error message
...Edit to fix mistake
If you don't have rlogin
, the command
is your username, will do about the same thing.