比cp更好用的rsync - jenhaoyang/backend_blog GitHub Wiki
顯示傳輸速率
rsync -avzh --progress /home/test/ /home/test2/
參考:
https://ithelp.ithome.com.tw/articles/10219308
http://it.givemepower.net/linux-command-rsync-remote-synchronization-and-backup-capabilities/