drills

1. Append user bob to group docker

2. Lock the account 'eve'

3. Set bob's shell to nologin

4. Expire alice's account on 2026-12-31

5. Set max password age 90 days for bob

6. Create user joe: home, bash, group ops

7. Give alice passwordless sudo (dropin)

8. chmod so file = rwxr-x---

9. Set SGID on directory /shared

10. Set sticky bit on a dir

11. ACL: give carol rwx on /srv/data

12. Default ACL so new files inherit carol rwx

13. Make file immutable