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Getty is the program that enables you to log in through a serial device such as a virtual terminal, a text terminal, or a modem. It displays the login prompt. Once you enter your username, getty hands this over to login which asks for a password, checks it out and gives you a shell.
There are many getty's available. Some distributions, including Red Hat use
a very small one called mingetty that only works with virtual terminals.
The login program is part of the util-linux package, which also
contains a getty called agetty , which works fine. This package also
contains mkswap , fdisk ,
passwd , kill , setterm , mount ,
swapon , rdev , renice ,
more (the program) and more (ie more programs).
The message that comes on the top of your screen with your login prompt comes
from /etc/issue . Gettys are usually started in /etc/inittab .
Login checks user details in /etc/passwd , and if you have password
shadowing, /etc/shadow .
Create a /etc/passwd by hand. Passwords can be set to null, and
changed with the program passwd once you log on. See the man page for
this file Use man 5 passwd to get the man page for the file rather
than the man page for the program.
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