Open a Teminal window, type ssh username@server_name. This is similar to Putty running on Windows OS. See the screenshot below.
Open a Teminal window and go to the directory where the files to be copied are located. Then user command
"scp" to copy files to the server. See the screenshot below. It copies a file named ssh_screenshot.png
to the user's public_html/images directory.
Normally this works only on campus where you have permssion to access campus server through network drive mapping.
Open a Finder window, select Connect to Server from menu Go. Then type server name to connect. See the screenshots below.