Optional. Use when specifying a local user name. The /ALL
    qualifier immediately follows the FINGER command.

    Displays a brief listing of all users in addition to detailed
    information about any specified users. Use this qualifier
    primarily for displaying information about users on the local
    host. The /ALL qualifier is ignored by most remote FINGER servers
    when you specify a remote host name in the command line. To
    display brief information about all users on a remote host in
    addition to detailed information about specific users, specify
    the user@hostname format for each user, along with @hostname
    (to list brief information about all users). Separate each
    user@hostname and @hostname specification with a space.