telnet user interface to the TELNET protocol Usage: telnet [-8] [-E] [-L] [-S tos] [-a] [-c] [-d] [-e char] [-l user] [-n tracefile][-r] [host-name [port]] Most commonly this will be just: telnet WARNING: Telnet protocol is unsafe, as it passes the passwords in clear text over the network. Use 'ssh' instead, where it's possible.