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Shell Programming and Scripting
Shell scripting issue-running the background script
Post 302823151 by rafa_fed2 on Wednesday 19th of June 2013 02:01:27 AM
06-19-2013
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LEARN ABOUT SUSE
mcookie
MCOOKIE(1) Linux Programmer's Manual MCOOKIE(1) NAME
mcookie - generate magic cookies for xauth SYNOPSIS
mcookie [-v] [-f filename] 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 output of the MD5 message digest fed with various pieces of random information: the current time, the process id, the parent process id, the contents of an input file (if -f is specified), and several bytes of information from the first of the following devices which is present: /dev/random, /dev/urandom, files in /proc, /dev/audio. BUGS
The entropy in the generated 128-bit is probably quite small (and, therefore, vulnerable to attack) unless a non-pseudorandom number gener- ator is used (e.g., /dev/random under Linux). It is assumed that none of the devices opened will block. FILES
/dev/random /dev/urandom /dev/audio /proc/stat /proc/loadavg SEE ALSO
X(1), xauth(1), md5sum(1) AVAILABILITY
The mcookie command is part of the util-linux-ng package and is available from ftp://ftp.kernel.org/pub/linux/utils/util-linux-ng/. 25 September 1995 MCOOKIE(1)