src:
- http://www.thegeekstuff.com/2008/11/3-steps-to-perform-ssh-login-without-password-using-ssh-keygen-ssh-copy-id/
https://docs.google.com/file/d/0B543p5wfySTQRkw2VTNkcmtBcDg/edit (prtpdf)
notes:
- 15'2/26:
[TODO] need to confirm whether it works?
