CompTIA Linux+ Portable Command Guide: All the commands for the CompTIA XK0-004 exam in one compact, portable resource, 2nd Edition

Chapter 8. Given a scenario, manage users and groups

This chapter provides information and commands concerning the following topics:

Creation

• useradd

• groupadd

Modification

• usermod

• groupmod

• passwd

• chage

Deletion

• userdel

• groupdel

Queries

• id

• whoami

• who

• w

• last

Quotas

• User quota

• Group quota

Profiles (BASH parameters)

• User entries (.bashrc, .bash_profile, .profile)

• Global entries (/etc/bashrc, /etc/profile.d/, /etc/skel, /etc/profile)

Important files and file contents

• /etc/passwd

• /etc/group

• /etc/shadow

Creation

This section focuses on the commands designed to create user and group accounts.

useradd

The useradd command is used by the root user to create a user account.

Example:

[root@OCS ~]$ useradd julia

Here are some important options ...