To create a connection, type \c{open host.name}, or if you need to
specify a user name as well you can type \c{open user@host.name}.
+You can optionally specify a port as well:
+\c{open user@host.name 22}.
Once you have issued this command, you will not be able to issue it
again, \e{even} if the command fails (for example, if you mistype