Section (1) mcookie
Name
mcookie — generate magic cookies for xauth
Synopsis
mcookie
[options]
DESCRIPTION
mcookie generates a 128-bit random hexadecimal number for use with the X authority system. Typical usage:
xauth add :0 . `mcookie`
The random number generated is actually the MD5 message
digest of random information coming from one of the sources
getrandom()
system call, /dev/urandom
,
/dev/random
, or the
libc pseudo-random
functions, in this preference order. See also the
option −−file
.
OPTIONS
−f, −−file
file
-
Use this file as an additional source of randomness (for example /dev/urandom). When file is _zsingle_quotesz_-_zsingle_quotesz_, characters are read from standard input.
−m, −−max−size
number
-
Read from file only this number of bytes. This option is meant to be used when reading additional randomness from a file or device.
The number argument may be followed by the multiplicative suffixes KiB=1024, MiB=1024*1024, and so on for GiB, TiB, PiB, EiB, ZiB and YiB (the iB is optional, e.g., K has the same meaning as KiB) or the suffixes KB=1000, MB=1000*1000, and so on for GB, TB, PB, EB, ZB and YB.
−v, −−verbose
-
Inform where randomness originated, with amount of entropy read from each source.
−V, −−version
-
Display version information and exit.
−h, −−help
-
Display help text and exit.
AVAILABILITY
The mcookie command is part of the util-linux package and is available from Linux Kernel Archive
mcookie.1 -- Public Domain 1995 Rickard E. Faith (faithcs.unc.edu) |