Please add `man -k' to the list of unix commands worth memorizing

For some reason ubuntu's network manager crashed and I was in a spot as I couldn't access google to figure out how to fix it.

Playing around with `man -h', I discovered `man -k', which lets you search the linux command documentation. `man -k network' brought up nm-applet, the command that restarts the ubuntu network manager. I just wish I had known about `man -k' earlier.