Create a New Group

Create a new developer group

# groupadd developers

Validate that the group was created successfully.

# grep developer /etc/group

Add an user to an existing group You cannot use useradd to modify an existing user, as you’ll get the following error message.

# useradd -G developers jsmith
useradd: user jsmith exists
# usermod -g developers jsmith

Validate the users group was modified successfully

# grep jsmith /etc/passwd
jsmith:x:510:511:Oracle Developer:/home/jsmith:/bin/bash
# id jsmith
uid=510(jsmith) gid=511(developers) groups=511(developers)
# grep jsmith /etc/group

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