Checkup is responsible for checking the consistency of the current MMDF system. Normally, it reports on all that it finds, including correct states. Things that it considers wrong are usually prefixed by two asterisks (**); information that is advisory is enclosed in square brackets ([]).
The two optional flags to checkup alter the verbosity of checkup's reporting: The -p option reports only problems that checkup comes across. This is useful for day-to-day checking of the system, such as mailing the output to postmaster.
The -v flag takes an optional digit to set the verbosity to some arbitrary value. If the digit is omitted, verbosity is set to the maximum. Values range from 1 (-p) level to 7 (which gives everything).
Some advice checkup gives about modes should not be taken too seriously (e.g. 0755 v. 0711). In particular it is common for sites to allow group read, write, or execute on files that checkup expects to be protected more carefully. Use of group permissions can greatly ease administration effort for system managers without compromising security. Warnings regarding ``others'' permissions should be examined.