32.2. User and Group Management Tools
Managing users and groups can be a tedious task; this is why Red Hat Enterprise Linux provides tools and conventions to make them easier to manage.
The easiest way to manage users and groups is through the graphical application, User Manager (system-config-users). For more information on User Manager, refer to Section 32.1, “User and Group Configuration”.
The following command line tools can also be used to manage users and groups:
useradd, usermod, and userdel — Industry-standard methods of adding, deleting and modifying user accounts
groupadd, groupmod, and groupdel — Industry-standard methods of adding, deleting, and modifying user groups
gpasswd — Industry-standard method of administering the /etc/group file
pwck, grpck — Tools used for the verification of the password, group, and associated shadow files
pwconv, pwunconv — Tools used for the conversion of passwords to shadow passwords and back to standard passwords