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   mcookie    ( 1 )

генерировать волшебные куки для xauth (generate magic cookies for xauth)

Имя (Name)

mcookie - generate magic cookies for xauth

Синопсис (Synopsis)

mcookie [options]

Описание (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(2) system call, /dev/urandom, /dev/random, or the libc pseudo-random functions, in this preference order. See also the option --file.


Параметры (Options)

-f, --file file
           Use this file as an additional source of randomness (for
           example /dev/urandom). When file is '-', 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.


Файлы (Files)

/dev/urandom

/dev/random


Ошибки (баги) (Bugs)

It is assumed that none of the randomness sources will block.

Смотри также (See also)

md5sum(1), X(7), xauth(1), rand(3)

Сообщение об ошибках (Reporting bugs)

For bug reports, use the issue tracker at
       https://github.com/karelzak/util-linux/issues.

Доступность (Availability)

The mcookie command is part of the util-linux package which can
       be downloaded from Linux Kernel Archive
       <https://www.kernel.org/pub/linux/utils/util-linux/>. This page
       is part of the util-linux (a random collection of Linux
       utilities) project. Information about the project can be found at
       ⟨https://www.kernel.org/pub/linux/utils/util-linux/⟩. If you have
       a bug report for this manual page, send it to
       util-linux@vger.kernel.org. This page was obtained from the
       project's upstream Git repository
       ⟨git://git.kernel.org/pub/scm/utils/util-linux/util-linux.git⟩ on
       2021-08-27. (At that time, the date of the most recent commit
       that was found in the repository was 2021-08-24.) If you discover
       any rendering problems in this HTML version of the page, or you
       believe there is a better or more up-to-date source for the page,
       or you have corrections or improvements to the information in
       this COLOPHON (which is not part of the original manual page),
       send a mail to man-pages@man7.org

util-linux 2.37.85-637cc 2021-04-02 MCOOKIE(1)