groupadd Command
Intermediate User Management man(1)Create a new group
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📅 Updated: Apr 30, 2026
SYNTAX
groupadd [OPTION]... GROUPNAME
What Does groupadd Do?
groupadd creates a new group on the system. Groups are fundamental to Linux permissions, allowing multiple users to share access to files and resources.
groupadd requires root privileges. It creates an entry in /etc/group with an automatically assigned GID (or a specified one). After creating a group, add users with usermod -aG or adduser.
Groups are used for file permissions (rwxrwxrwx), service access (docker, sudo, www-data), and project-based collaboration.
groupadd requires root privileges. It creates an entry in /etc/group with an automatically assigned GID (or a specified one). After creating a group, add users with usermod -aG or adduser.
Groups are used for file permissions (rwxrwxrwx), service access (docker, sudo, www-data), and project-based collaboration.
Options & Flags
| Option | Description | Example |
|---|---|---|
| -g | Specify GID (group ID) | sudo groupadd -g 1500 developers |
| -r | Create system group (low GID) | sudo groupadd -r appgroup |
| -f | Exit with success if group exists | sudo groupadd -f developers |
Practical Examples
#1 Create a group
Creates a new group with an auto-assigned GID.
$ sudo groupadd developers#2 Create with specific GID
Creates the group with GID 1500.
$ sudo groupadd -g 1500 developers#3 Create system group
Creates a system group with a low GID (for services).
$ sudo groupadd -r myapp#4 Add users to new group
Creates a group and adds two users to it.
$ sudo groupadd project-x && sudo usermod -aG project-x alice && sudo usermod -aG project-x bob#5 Set directory group
Creates group, assigns it to directory, and sets setgid.
$ sudo groupadd webteam && sudo chgrp webteam /var/www/project && sudo chmod g+ws /var/www/projectTips & Best Practices
Use setgid for shared directories: After creating a group and assigning it to a directory, set the setgid bit: chmod g+s dir/. New files inherit the group.
System vs regular groups: System groups (-r) get low GIDs and are for services. Regular groups get higher GIDs and are for users.
Group changes need re-login: After adding a user to a group, they must log out and back in. Or use newgrp groupname for the current session.
Frequently Asked Questions
How do I create a new group?
sudo groupadd groupname. Then add users: sudo usermod -aG groupname username.
How do I create a shared project group?
sudo groupadd project && sudo usermod -aG project user1 && sudo usermod -aG project user2. Then chgrp -R project /path/to/shared/.
How do I delete a group?
sudo groupdel groupname. This only works if no user has it as their primary group.
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