@(1)                   XR32 REFERENCE MANUAL                19/1/2013

COMMAND
        @ -- Request / answer password challenge

SYNOPSIS
        @ [string]

DESCRIPTION
        In order to gain access to sensitive commands, remote sysops
        must first complete a password challenge.  Firstly, the remote
        sysop enters "@" alone, and the system replies with a matrix
        consisting of 5 lines of 5 numbers thus:

              4 1 6 3 7
              3 5 2 6 3
              7 1 9 2 4
              2 7 1 4 6
              3 5 2 6 1

        The remote sysop must then choose ONE of the lines, and send
        the "@" command again, followed by the 5 characters from the
        password string which correspond to the 5 numbers on the
        chosen line.  There must be a space after the "@" but no
        spaces between the characters.

        If the challenge is correctly answered, the system replies
        with "Ok", and the user has remote sysop status.

LIMITATIONS
        If the user does not have a password registered in
        PASSWORD.SYS, the response to this command will be "Bad
        command".

NOTE
        Console sysops already have full access and don't need to use
        this command.

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