How to change primary group?

To change a user's primary group in Linux, you can use the usermod command. Here’s the syntax:

sudo usermod -g new_primary_group username

Breakdown of the command:

• sudo: Runs the command with root privileges.
• usermod: The command used to modify user accounts.
• -g new_primary_group: Specifies the new primary group.
• username: The name of the user whose primary group you want to change.

Example:

If you want to change the primary group of a user named "john" to "developers", you would run:

sudo usermod -g developers john

After executing this command, you can verify the change by checking the user's details with:

id john

This will display the user ID and the groups the user belongs to, including the new primary group.