Mathematics, Misc

Was there room on the door for two?

Could Jack Dawson (Leonardo DiCaprio) and Rose DeWitt Bukater (Kate Winslet) from the motion picture ‘Titanic’ both have survived by both floating on the door? (Clearly there are a load of spoilers in this article – but the film did come out over 20 years ago so I’m not going to worry too much about […]

Linux

Unblock IP address from connecting via SSH

I manage a small cluster at work and occasionally students get their IP address banned by entering the wrong password when logging into the cluster. I don’t fix the problem often enough to remember how to do it, so I thought I’d jot it down here for future reference.