tmux new [-s name] [cmd]
(:new
) - new session
tmux ls
(:ls
) - list sessionstmux switch [-t name]
(:switch
) - switches to an existing session
FWIW: I didn't produce the content present here. I've just copy-pasted it from somewhere over the Internet, but I cannot remember exactly the original source. I was also not able to find the author's name, so I cannot give him/her the proper credit.