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Installed Documentationindexterm:[groups,additional resources,installed documentation]indexterm:[users,additional resources,installed documentation]
For information about various utilities for managing users and groups, see the following manual pages:
`useradd`(8) — The manual page for the [command]#useradd# command documents how to use it to create new users.
`userdel`(8) — The manual page for the [command]#userdel# command documents how to use it to delete users.
`usermod`(8) — The manual page for the [command]#usermod# command documents how to use it to modify users.
`groupadd`(8) — The manual page for the [command]#groupadd# command documents how to use it to create new groups.
`groupdel`(8) — The manual page for the [command]#groupdel# command documents how to use it to delete groups.
`groupmod`(8) — The manual page for the [command]#groupmod# command documents how to use it to modify group membership.
`gpasswd`(1) — The manual page for the [command]#gpasswd# command documents how to manage the `/etc/group` file.
`grpck`(8) — The manual page for the [command]#grpck# command documents how to use it to verify the integrity of the `/etc/group` file.
`pwck`(8) — The manual page for the [command]#pwck# command documents how to use it to verify the integrity of the `/etc/passwd` and `/etc/shadow` files.
`pwconv`(8) — The manual page for the [command]#pwconv#, [command]#pwunconv#, [command]#grpconv#, and [command]#grpunconv# commands documents how to convert shadowed information for passwords and groups.
`id`(1) — The manual page for the [command]#id# command documents how to display user and group IDs.
For information about related configuration files, see:
`group`(5) — The manual page for the `/etc/group` file documents how to use this file to define system groups.
`passwd`(5) — The manual page for the `/etc/passwd` file documents how to use this file to define user information.
`shadow`(5) — The manual page for the `/etc/shadow` file documents how to use this file to set passwords and account expiration information for the system.