linuxexpert-practice-labs/labs/rhcsa/9-3-groups

RHCSA 9.3: Local groups and membership

Creating a group with members, changing its members, name and GID, and why a user's own group can't be deleted.

Before you start

The lab creates users alice and bob (password Lab-Pass-1). alice is already in a supplementary group, projects, and bob in support; they must stay there. Task 2 changes what task 1 made, so the lab runs a small service, le-lab-watch, that notes the group every second for the check. Do the tasks in order.

Tasks

1. Create a group sales with GID 3000, and add alice and bob to it as a supplementary group without changing their other groups.
2. Remove bob from sales, and rename the group to market with GID 3001.
3. Try to delete alice's private group (alice) while she exists, and write the error message groupdel prints to /root/lab-answers/3.

Hints

• groupadd -g, usermod -aG (without -a, -G replaces the list) or gpasswd -a; getent group sales, id alice.
• gpasswd -d, groupmod -n -g.
• groupdel alice 2>/root/lab-answers/3.