3.6. Additional Resources

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See the following resources for more information about managing users and groups.

3.6.1. Installed Documentation

For information about various utilities for managing users and groups, see the following manual pages:
  • chage(1) — A command to modify password aging policies and account expiration.
  • gpasswd(1) — A command to administer the /etc/group file.
  • groupadd(8) — A command to add groups.
  • grpck(8) — A command to verify the /etc/group file.
  • groupdel(8) — A command to remove groups.
  • groupmod(8) — A command to modify group membership.
  • pwck(8) — A command to verify the /etc/passwd and /etc/shadow files.
  • pwconv(8) — A tool to convert standard passwords to shadow passwords.
  • pwunconv(8) — A tool to convert shadow passwords to standard passwords.
  • useradd(8) — A command to add users.
  • userdel(8) — A command to remove users.
  • usermod(8) — A command to modify users.
For information about related configuration files, see:
  • group(5) — The file containing group information for the system.
  • passwd(5) — The file containing user information for the system.
  • shadow(5) — The file containing passwords and account expiration information for the system.
  • login.defs(5) - The file containing shadow password suite configuration.
  • useradd(8) - For /etc/default/useradd, section “Changing the default values” in manual page.
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