The groupadd command can be used in Linux to add user groups to the system. The basic syntax of Linux groupadd command is groupadd <groupname>. If no command-line options are used, the group is created with the next available Group ID number (GID) above 499. To specify a GID, use the groupadd -g <gid> <group-name> command.

[root@RHEL2 ~]# groupadd engineering

To add existing Linux users to a group, use the usermod -G <groups> <username> command.

[root@RHEL2 ~]# usermod -G engineering tintin

Note: You should be familiar how to add a user in Linux before learning this lesson. Click the following link to learn how to add a user in a Linux machine using useradd command.

 

Related Topics...

• Introduction to Linux user administration

• How to add a user in Linux using useradd command

• How to use passwd command to manage user passwords

• How to modify a Linux user using usermod command

• How to set Linux password aging using chage command

• How to remove user from Linux using userdel command

• The Linux user database (/etc/passwd)

• The Linux password database (/etc/shadow)

• Introduction to Linux User Group

• Linux Group Database (/etc/group) file

• How to manage Linux user group

 

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