tmux
code:minimal.conf
set -g prefix C-j
code:sh
# tmux 2.3
bind -t emacs-copy C-Up scroll-up
# tmux 2.4
bind -T copy-mode C-Up send -X scroll-up
GCP Cloud Shell (Debian 9) ではtmux 2.3
tmuxのバージョン分岐
https://stackoverflow.com/questions/35016458/how-to-write-if-statement-in-tmux-conf-to-set-different-options-for-different-t