The username identifies the specified user name, Sessionname session name, Sessionid session ID, @ filename to identify such a file, the file containing the message sent to the user And the session and the session id list, * to specify all the session on the server to send information, /SERVER: servername to connect SERVER (the default value is the current value), /TIME: seconds to wait for a confirmation message receiver TIME delay, /V shows information concerning the operation of the execution, /W waiting for user's response, with a/V useful, The message to send a message, if not specified, warning, or from stdin Read,