$ curl cheat.sh/
# vncviewer
# Launches a VNC (Virtual Network Computing) client.
# More information: <https://manned.org/vncviewer>.

# Launch a VNC client which connects to a host on a given display:
vncviewer host:display_number

# Launch in full-screen mode:
vncviewer -FullScreen host:display_number

# Launch a VNC client with a specific screen geometry:
vncviewer --geometry widthxheight host:display_number

# Launch a VNC client which connects to a host on a given port:
vncviewer host::port

$
Follow @igor_chubin cheat.sh tldr