tmux has a scroll mode where you can use page up/page down and arrows to scroll the buffer back. To enter scroll mode,
C-b <page up>. To get out of scroll mode,
C-b [ turns on scroll mode.
Poor man's screen sharing:
$ tmux -S /tmp/tmux-shared new-session -s session-name (detach) $ chmod 777 /tmp/tmux-shared (attach)
Person 2 attaches:
$ tmux -S /tmp/tmux-shared attach-session -s session-name