Commands Used in This Chapter

The following list contains a summary of all the commands introduced in this chapter:

Command	Description
groupadd	Adds groups
groupdel	Deletes groups
groupmod	Modifies groups
groups	Identifies group membership
grpck	Checks the consistency of the /etc/group file
last	Provides a historical list of all system logins and logouts
newgrp	Changes the user's primary group membership
passwd	Changes user passwords
pwck	Checks the consistency of the /etc/passwd file
set	Sets shell variables in the C shell
setenv	Sets environment variables in the C shell
su	Enables you to switch users or assume a role
useradd	Adds users
userdel	Deletes users
usermod	Modifies users
who	Shows who is logged in to the system