Fortigate CLI

Get list of current DHCP leases including hostname (handy when trying to find a machine without FSSO)
# execute dhcp lease-list

IP Addresses of interfaces. Make sure NOT to hit enter, just hit question mark.
# show system interface ?

System Information such as model

Show TOP system processes.
# diag sys top

Who’s logged in?
# get system info admin status

Provides ample information on the hardware, part number (sometimes you need to know this before applying firmware), OS, AV
# get system status