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FSIRAND(8)                  System Manager's Manual                 FSIRAND(8)

NAME
     fsirand - install random inode generation numbers in a filesystem

SYNOPSIS
     fsirand [-F] [-p] [-x constant] special

DESCRIPTION
     fsirand writes random inode generation numbers for all the inodes on
     device special.  These random numbers make the NFS filehandles less
     predictable, increasing security of exported filesystems.

     fsirand should be run on a clean and unmounted filesystem.

     The options are as follows:

     -F      Indicates that special is a file system image, rather than a
             device name.  special will be accessed `as-is', without requiring
             that it is a raw character device and without attempting to read
             a disklabel.

     -p      Print the current inode generation numbers; the filesystem is not
             modified.

     -x constant
             Exclusive-or the given constant with the random number used in
             the generation process.

     fsirand exits zero on success, non-zero on failure.

     If fsirand receives a SIGINFO signal, statistics on the amount of work
     completed and estimated completion time (in minutes:seconds) will be
     written to the standard error output.

SEE ALSO
     fsck_ffs(8), newfs(8)

HISTORY
     A fsirand utility appeared in NetBSD 1.3.

AUTHORS
     Christos Zoulas <christos@NetBSD.org>.

NetBSD 9.99                   September 11, 2016                   NetBSD 9.99