If the -f option is used, this parameter is interpreted as the name of a local file which is to be displayed. If the -u option is used, it is interpreted as a general URL.
This parameter is ignored if the -f or -u options are used.
Note that the URL generated is suitable only for local use by a WWW browser running on the same machine as the showme command. It may not be suitable, for instance, for embedding in an HTML document that will be interpreted by a remote WWW browser.