The `history` command

history | grep <command> - the commands you ran that match <command>
!123 - re-run command 123 in the history

A Ctrl+B Cheat Sheet for Tmux

Taken from Howtogeek

Fuller cheat sheet here

Session Commands

S: List sessions.
$: Rename current session.
D: Detach current session.
Ctrl+B, and then ?: Display Help page in tmux.

Window Commands

C: Create a new window.
,: Rename the current window.
W: List the windows.
N: Move to the next window.
P: Move to the previous window.
0 to 9: Move to the window number specified.

Pane Commands

%: Create a horizontal split.
“: Create a vertical split.
H or Left Arrow: Move to the pane on the left.
I or Right Arrow: Move to the pane on the right.
J or Down Arrow: Move to the pane below.
K or Up Arrow: Move to the pane above.
Q: Briefly show pane numbers.
O: Move through panes in order. Each press takes you to the next, until you loop through all of them.
}: Swap the position of the current pane with the next.
{: Swap the position of the current pane with the previous.
X: Close the current pane.