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RNDCONTROL(8)           FreeBSD System Manager's Manual          RNDCONTROL(8)

NAME
     rndcontrol - a utility for manipulating the /dev/random device

SYNOPSIS
     rndcontrol [-q] [-s irq_no] [-c irq_no]

DESCRIPTION
     The rndcontrol command is used to set which interrupts are used to help
     randomise the ``pool of entropy'' maintained by the kernel.  The
     /dev/random and /dev/urandom devices are the user interface to this
     source of randomness.  Any changes take effect immediately.

     The following command line options are supported:

     -q      Turn off all output except errors.

     -s n    Allow IRQ n to be used as a source of randomness.  This option
             may be repeated for more than one IRQ.

     -c n    Stop IRQ n from being used as a source of randomness.  This
             option may be repeated for more than one IRQ.

     The default is to have no IRQ's being used.

FILES
     /dev/random       secure random device
     /dev/urandom      random device

BUGS
     Sure to be some.

SEE ALSO
     random(4)

AUTHORS
     Theodore Ts'o wrote the core code.  Mark Murray ported this code to
     FreeBSD and wrote the support routines and constructed the man pages.

HISTORY
     The rndcontrol utility first appeared in FreeBSD 2.1.5.

FreeBSD 11.0-PRERELEASE        October 20, 1995        FreeBSD 11.0-PRERELEASE
NAME | SYNOPSIS | DESCRIPTION | FILES | BUGS | SEE ALSO | AUTHORS | HISTORY

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