32.7. Additional Resources
32.7. Additional Resources For more information about users and groups, and tools to manage them, refer to the following resources. 32.7.1. 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.