Chapter 2: Accessing Your System and the Common Desktop Environment

Commands:

Command Description Examples
init 0 Its primary role is to create processes from information stored in the file /etc/inittab. 

At any given time, the system is in one of eight possible run levels.  A run level is a software configuration under which only a selected group of processes exist.  Run levels 0, 5, 6 are reserved states for shutting the system down.

 

 

passwd Changes login password and password attributes $ passwd
passwd:  Changing password for user2
Enter login password:  abc123
New password:  unix123
Re-enter new password:  unix123
passwd (SYSTEM): passwd successfully changed for user2
$
shutdown By default, shutdown brings the system to a state where only the console has access to the operating system. This state is called single-user.