Starting Your Terminal with tmux

I am getting more comfortable with tmux and I want to make sure I don't forget to use it when I'm at the command prompt. So, I made a simple Bash script to automatically connect to an existing session or start a new session when I start my terminal:

tmux-start.sh:

#!/bin/bash
tmux ls > /dev/null ; [ $? == 0 ] && tmux attach || tmux

• tmux ls will list existing sessions, but I'm dumping that output and just using its return value which will be 0 if there are any existing sessions.
• $? is the return value of the previous command
• && ... || is basically equivalent to a ternary operator in other programming languages