Adding Groups:

• Command: addgroup [groupname]

• Example: sudo addgroup developers

Adding Users to Groups:

• Command: usermod -aG [groupname] [username]

• Example: sudo usermod -aG developers john

Removing Groups:

• Command: delgroup [groupname]

• Example: sudo delgroup developers

Listing Groups:

• Command: groups [username]

• Example: groups john (Lists groups the user belongs to).