There are five flags for this command:

• -c [INSERT VALUE]/--command [INSERT VALUE]: Runs a command directly via SSH using the first parameter supplied.
• -p/--plain: Connects in plain mode, leaving you to choose the authentication.
• -t/--tty: Enables tty when you run an SSH command. This is the default value.

• --no-tty: Disables tty when you run an SSH command.
• -h/--help: Prints the help screen for this command.

An example is the vagrant ssh --plain command.