Just my 2¢
ssh + tmux = Pair Programming for Command Line Junkies
A complete guide to pairing, using tools you already know and love.
Using a GPG key for SSH Authentication
One less private key to keep track of.
save-message → sync-mailbox Automatically in Mutt
Making mutt sync the mailbox on its own is messier than it should have to be — but it can be done.