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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 4.9 October 20, 1995 FreeBSD 4.9
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