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15.7. Additional Resources
For more information about users and groups, and tools to manage them, refer to the following resources.
15.7.1. Installed Documentation
Related man pages — There are a number of man pages for the various applications and configuration files involved with managing users and groups. Some of the more important man pages have been listed here:
User and Group Administrative Applications
man chage — A command to modify password aging policies and account expiration.
man gpasswd — A command to administer the /etc/group file.
man groupadd — A command to add groups.
man grpck — A command to verify the /etc/group file.
man groupdel — A command to remove groups.
man groupmod — A command to modify group membership.
man pwck — A command to verify the /etc/passwd and /etc/shadow files.
man pwconv — A tool to convert standard passwords to shadow passwords.
man pwunconv — A tool to convert shadow passwords to standard passwords.
man useradd — A command to add users.
man userdel — A command to remove users.
man usermod — A command to modify users.
Configuration Files
man 5 group — The file containing group information for the system.
man 5 passwd — The file containing user information for the system.
man 5 shadow — The file containing passwords and account expiration information for the system.
