how to reuse ssh session (and do not enter password more than once)

ssh-reuse-session.sh

#!/bin/bash

# from https://serverfault.com/a/842825/200976

# Create ssh-mux (SSH multiplex) dir only if not exists
[[ ! -d dir ]] || mkdir ~/.ssh/ssh-mux

apache_site_path_source="/var/www/source_site"
apache_site_path_target="/var/www/target_site"

# Solution: Start SSH multiplexing session (works fine)
# https://unix.stackexchange.com/questions/50508/reusing-ssh-session-for-repeated-rsync-commands
sudo ssh -nNf -o ControlMaster=yes -o ControlPath="~/.ssh/ssh-mux/%L-%r@%h:%p" root@192.168.0.1

sudo rsync -av --progress -e 'ssh -l root -p 22 -o "ControlPath=~/.ssh/ssh-mux/%L-%r@%h:%p"' 192.168.0.1:${apache_site_path_source}/. ${apache_site_path_target}/;
printf "\n\n\n\n\n\n"
sudo rsync -av --progress -e 'ssh -l root -p 22 -o "ControlPath=~/.ssh/ssh-mux/%L-%r@%h:%p"' 192.168.0.1:${apache_site_path_source}/. ${apache_site_path_target}/;
printf "\n\n\n\n\n\n"
sudo rsync -av --progress -e 'ssh -l root -p 22 -o "ControlPath=~/.ssh/ssh-mux/%L-%r@%h:%p"' 192.168.0.1:${apache_site_path_source}/. ${apache_site_path_target}/;
printf "\n\n\n\n\n\n"

# Finish SSH multiplexing session
sudo ssh -O exit -o ControlPath="~/.ssh/ssh-mux/%L-%r@%h:%p" root@192.168.0.1