cracklib-packer man page on Oracle

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cracklib-format(8)	    Debian GNU/Linux manual	    cracklib-format(8)

       cracklib-format,	 cracklib-packer, cracklib-unpacker - cracklib dictio‐
       nary utilities

       cracklib-format file ...

       cracklib-packer cracklib_dictpath

       cracklib-unpacker cracklib_dictpath

       cracklib-format takes a list of text files each containing  a  list  of
       words,  one  per line, It lowercases all words, removes control charac‐
       ters, and sorts the lists.  It outputs the cleaned up list to  standard
       output.	The text files may be optionally compressed with gzip(1).

       If  you supply massive amounts of text to cracklib-format you must have
       enough free space available for use by the sort(1) command.  If you  do
       not have 20Mb free in /var/tmp (or whatever temporary area your sort(1)
       command uses), have a look  at  the  /usr/sbin/cracklib-format  program
       which is a sh(1) program.  You can usually tweak the sort(1) command to
       use any large area of disk you desire, by use of the -T option.	crack‐
       lib-format has a hook for this.

       cracklib-packer	reads from standard input a list of sorted and cleaned
       words and creates a database in the directory and prefix given  by  the
       command	line argument cracklib_dictpath.  Three files are created with
       the suffixes of .hwm, .pwd, and .pwi.  These three  files  are  in  the
       format  that  the FascistCheck(3) subroutine, cracklib-unpacker(8), and
       cracklib-check(8), utilities understand.	 The number of words read  and
       written are printed on stdout(3).

       cracklib-unpacker  reads	 from the database in the directory and prefix
       given by the command line argument  cracklib_dictpath  and  outputs  on
       standard output the list of words that make up the database.

       The  database  is  in a binary format generated by the utilities crack‐
       lib-format(8) and cracklib-packer(8).  On a Debian system the  database
       is  located  in	the directory /var/cache/cracklib/cracklib_dict and is
       generated daily with the program /etc/cron.daily/cracklib.   The	 loca‐
       tion  is	 also  defined	in  the header file crack.h using the constant
       CRACKLIB_DICTPATH though	 none  of  the	subroutines  in	 the  cracklib
       libraries have this location hardcoded into their implementations.

	      cracklib dictionary database files used by utilities.

	      cracklib	daily  cron program to rebuild the cracklib dictionary

	      cracklib configuration file used by the cracklib daily cron pro‐
	      gram to rebuild the cracklib dictionary database.

	      cracklib header file defining the subroutine FascistCheck(3) and
	      the constant CRACKLIB_DICTPATH used to compile in	 the  location
	      of the cracklib dictionary database for these utilities.

	      cracklib	shell  script to create initial list of words for dic‐
	      tionary database.

       FascistCheck(3), cracklib-check(8),  update-cracklib(8),	 create-crack‐

       cracklib2  is written by Alec Muffett <>. Man‐
       ual added by Jean Pierre LeJacq <>.

2.7-8.5			 Sat Jun 21 22:43:12 CEST 2008	    cracklib-format(8)

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