Trouble with Lab 3.2 (Examining System V IPC Activity)
I had some issues working with Lab 3.2 as the output of ipcs was totally blank. This was on a standard Ubuntu 18.04 64-bit server.
I think the issue is that a basic Ubuntu Server installation no longer really uses System V IPC, so you won't see anything... I resolved it by using a Ubuntu 18.04 Desktop VM for that lab instead, which I luckily had lying around... and bam, some stuff showed up.
Hopefully this helps somebody