For the 2nd test you need to know about:
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- firewall configuration with uwp (14)
- display various information (14)
- Http config (13)
- cron jobs (systat configuration) ( 13)
- system monitoring tools (13) especially top and ps

- The sar utility (monitoring) (13)
- DHCP server and client configuration (12)
- package (programs) instalation: from sources, with apt, with dpkg (linux11-kernel-Ubuntu-en) and (linux10-Ubuntu-install.txt)
- kernel configuration and build (linux11-kernel-Ubuntu-en)

- runlevels and services (linux9-runlevels-en.txt)

- Samba: server configuration, shares configuration, mounting the shares on Windows clients (linux4*)