$ curl cheat.sh/
# telnet
# Connect to a specified port of a host using the telnet protocol.
# More information: <https://manned.org/telnet>.

# Telnet to the default port of a host:
telnet host

# Telnet to a specific port of a host:
telnet ip_address port

# Exit a telnet session:
quit

# Emit the default escape character combination for terminating the session:
Ctrl + ]

# Start telnet with "x" as the session termination character:
telnet -e x ip_address port

# Telnet to Star Wars animation:
telnet towel.blinkenlights.nl

$
Follow @igor_chubin cheat.sh tldr