drills

1. Enable AND start nginx now

2. Check if a service is enabled at boot

3. Reload systemd after editing a unit

4. Permanently block (mask) telnet

5. Set default boot target to CLI

6. Show this-boot journal for sshd

7. List failed systemd units

8. List all systemd timers

9. Add root cron: x.sh daily at 03:15

10. One-off job at 09:00 today

11. Which pkg owns /usr/bin/tree

12. List files installed by pkg curl

13. Load kernel module br_netfilter now

14. Persist that module at boot