<para>Invoked with the <option>-c</option> option, the program checks
your local and remote ssh configuration for problems without changing
-anything.</para>
+anything (except that your record of where you have installed keys is
+updated).</para>
<para>The -p option allows you to set a port number, overriding the
default 22. This may be useful if you have a firewall and port
forwarding setup.</para>
<para>Invoked with the <option>-d</option> option, the program deletes
-any public keys under the specified login at the specified host.</para>
+any public keys under the specified login at the specified host. The
+configuration entries for any such keys are also removed.</para>
<para>The <option>-v</option> option says to report all commands and
responses during the session. It's mainly useful for debugging.</para>