The Linux Newbie Guide - useradd Command

The Linux Newbie Guide

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Fundamentals

useradd - Add User Accounts

The useradd command is used to add new user accounts on a Unix-like operating system. It is typically executed by the superuser (root) as it involves creating user accounts and modifying system files.

The basic syntax for the useradd command is as follows:
useradd [OPTIONS] USERNAME 。

Here, "USERNAME" is the name of the new user account you want to create.

Some of the most commonly used options for the useradd command include:

-d: Specify the home directory for the new user account.
-g: Specify the initial login group for the new user account.
-G: Specify additional groups that the new user account should be a member of.
-m: Automatically create the user's home directory.
-s: Specify the default shell for the new user account.

For example, if you're logged in as the root user:

# useradd -m connie ←Creates a user account named "connie" and automatically creates a home directory with the same name
# useradd -g rd suuny ←Creates a user account named "sunny" and assigns it to the "rd" group

For more details on the useradd command and additional examples, you can refer to the provided link.