Automatically start tmux on ssh connection. Logout on detach.

.bashrc.bash

# Original: http://blog.thelinuxkid.com/2013/06/automatically-start-tmux-on-ssh.html
# Saving for our children.

# This should always be run last either in .bashrc or as a script in .bashrc.d
if [[ -z "$TMUX" ]]; then
    tmux has-session &> /dev/null
    if [ $? -eq 1 ]; then
      exec tmux new
      exit
    else
      exec tmux attach
      exit
    fi
fi