Shell utility for continuously synchronizing two directories (possibly local and remote)

dirsync

#!/bin/sh
 
 if [ $# -ne 2 ]; then
     echo "Usage:"
     echo "dirsync <source> <target>"
 fi
 
 while inotifywait -r -e modify,create,delete "$1"; do
     rsync -avz "$1" "$2"
 done