Start a tmux with top - hour - iftop ; uses panes ;

tmux_watch.sh

#!/bin/bash
source /root/.bashrc
tmux kill-session -t watch
tmux new -d -s watch
tmux send-keys -t watch:0.0 'tmux split-window -h' ENTER
tmux send-keys -t watch:0.0 'tmux split-window' ENTER
tmux send-keys -t watch:0.0 'tmux split-window' ENTER
sleep 1
tmux send-keys -t watch:0.1 'top' ENTER
tmux send-keys -t watch:0.2 'iftop' ENTER
tmux clock-mod -t watch:0.0
tmux resize-pane -t watch:0.0 -U 5

to launch

bash tmux_watch.sh
tmux attach -t watch