| FSIRAND(8) | System Manager's Manual | FSIRAND(8) | 
fsirand —
| fsirand | [ -F] [-p]
      [-xconstant]
      special | 
fsirand writes random inode generation numbers for all
  the inodes on device special. These random numbers make
  the NFS filehandles less predictable, which was once thought to increase
  security of exported file systems.
fsirand is no longer relevant because
    newfs(8) has randomized inode
    generation numbers on all new file systems since NetBSD
    2.0, and in any case, exporting a file system to NFS clients allows
    them to traverse the entire file system, so making filehandles less
    predictable does not prevent clients from finding them anyway.
fsirand should be run on a clean and
    unmounted filesystem.
The options are as follows:
-F-p-x
    constantfsirand 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.
fsirand utility appeared in NetBSD
  1.3.
| September 11, 2016 | NetBSD 10.1 |