ssh tip

https://stackoverflow.com/questions/625409/how-do-i-put-an-already-running-process-under-nohup

http://stackoverflow.com/questions/32221168/allow-ssh-for-specific-ip-address-and-block-all-other-servers-using-etc-hosts-a

About tee command,. to unbuffer
http://stackoverflow.com/questions/11337041/force-line-buffering-of-stdout-when-piping-to-tee

https://unix.stackexchange.com/questions/26728/prepending-a-timestamp-to-each-line-of-output-from-a-command