Add ssht to Linux

I recently ran across ssht (via Stack Overflow, of course) when trying to figure out how to launch tmux automatically upon an SSH connection.

Enter this into a BASH prompt (assuming /usr/bin/ is in your PATH), and you’ll be good to go to use ssht as a drop-in replacement for ssh!

sudo curl https://raw.githubusercontent.com/brejoc/ssht/master/ssht -o /usr/bin/ssht && sudo chmod +x /usr/bin/ssht