ssh & sftp & MacOS
https://www.technoduet.com/a-simple-way-to-connect-to-remote-ftp-sever-on-mac/
$ ssh root@example.com
http://osxdaily.com/2017/04/28/howto-ssh-client-mac/
http://osxdaily.com/2016/08/16/enable-ssh-mac-command-line/
https://mediatemple.net/community/products/dv/204405144/using-ssh-in-terminal.app-(mac-os-x)
how to connect sftp from macos
http://osxdaily.com/2011/09/30/remote-login-ssh-server-mac-os-x/ http://osxdaily.com/2011/09/29/start-an-ftp-or-sftp-server-in-mac-os-x-lion/ https://apple.stackexchange.com/questions/280662/connect-to-remote-server-with-macos-sierra-through-sftp
https://www.ssh.com/ssh/putty/mac/
https://accc.uic.edu/answer/how-do-i-use-ssh-and-sftp-mac-os-x