3. Operate running systems

Boot, reboot, and shut down a system normally
Boot systems into different targets manually
Interrupt the boot process in order to gain access to a system
Identify CPU/memory intensive processes, adjust process priority with renice, and kill processes
Locate and interpret system log files and journals
Access a virtual machine’s console
Start and stop virtual machines
Start, stop, and check the status of network services
Securely transfer files between systems