.tmux.conf

# -- default shell --
set-option -g default-shell /bin/zsh
set-option -g default-command /bin/zsh

# -- prefix --
set -g prefix C-s
unbind C-b

# -- line max --
set -g history-limit 50000

# -- mouse --
set -g mouse on

# -- keybind --
## copy
bind Space copy-mode
bind p paste-buffer
bind P choose-buffer
## change pane
bind h select-pane -L
bind j select-pane -D
bind k select-pane -U
bind l select-pane -R
## change window
bind C-c new-window
bind C-p previous-window
bind C-n next-window
bind C-l list-window
## kill pane or window
bind C-k confirm-before -p "kill-pane? (y/n)" kill-pane
bind S set-window-option synchronize-panes

# -- design --
set-option -g status-interval 1
set-option -g status-style bg="colour238",fg="colour255"
set-option -g status-left-length 20
set-option -g status-left "#[fg=colour255,bg=colour241]Session: #S #[default]"
set-option -g status-right-length 40
set-option -g status-right '#[fg=colour255,bg=colour241] #h | %m/%d %H:%M:%S#[default]'
set-option -g pane-active-border-style fg=brightblue
set-window-option -g window-status-format "#I: #W"
set-window-option -g window-status-current-style bg="colour27",fg="colour255"
set-window-option -g window-status-current-format " #I: #W "

good bye byobu

https://qiita.com/TsutomuNakamura/items/663b8e456768f29e37ed

tmux 3.0a on ubuntu 20.04