apt-cache

The other day I was helping a co-worker set up Ubuntu in VirtualBox, to simulate the production servers.  At one point, I told him to search for a package by typing "apt dash cache space search space dash n space ..."

He types it in and says, it didn't work.  I walk over to check his display.  He's written "apt-gash search -n ..."

I say "You didn't take pre-med in college, you studied CS!  It's apt-cache, not apt-gash!"  He didn't understand what I meant.

So he corrects it, and types in "apt-cash search -n ..."