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, −−filefile-
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−sizenumber-
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
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mcookie.1 -- Public Domain 1995 Rickard E. Faith (faithcs.unc.edu) |