Follow Techotopia on Twitter

On-line Guides
All Guides
eBook Store
iOS / Android
Linux for Beginners
Office Productivity
Linux Installation
Linux Security
Linux Utilities
Linux Virtualization
Linux Kernel
System/Network Admin
Scripting Languages
Development Tools
Web Development
GUI Toolkits/Desktop
Mail Systems
Eclipse Documentation

How To Guides
General System Admin
Linux Security
Linux Filesystems
Web Servers
Graphics & Desktop
PC Hardware
Problem Solutions
Privacy Policy




Red Hat Enterprise Linux 9 Essentials Book now available.

Purchase a copy of Red Hat Enterprise Linux 9 (RHEL 9) Essentials

Red Hat Enterprise Linux 9 Essentials Print and eBook (PDF) editions contain 34 chapters and 298 pages

Preview Book

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.

  Published under the terms of the Creative Commons License Design by Interspire