Linux
The commands I tend to use...
c-b % : split vertical
c-b " : split horizontal
c-b <arrow> : navigate
c-b c : create new
c-b n : next window
c-b p : previous window
c-b d/D : detach
tmux list-sessions (ls) : list sessions
tmux attach (a) -t num/name : re-attach to session
tmux new -s session_name
tmux rename-session -t 0 session_name
From: http://tmuxcheatsheet.com/