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dbCatenate(1)							 dbCatenate(1)

NAME
       dbCatenate,  dbCompare,	dbCompress,  dbCopy,  dbDescribe,  dbExpand  -
       hashed database utilities

DESCRIPTION
       These commands, found in /usr/lib/database, are utilities for  managing
       hashed databases created with db(3).

       dbCatenate [-x] databases ...
	    Catenates  the key/content pairs stored in the specified databases
	    to	the  standard  output.	The  order  is	uninteresting,	 being
	    determined	by  a hash function.  -x catenates a hexadecimal ASCII
	    representation of the information.

       dbCompare [-v][-V] from-database to-databases ...
	    Compares from-database with	 to-databases,	looking	 up  each  key
	    found  in  from-database  in each of the to-databases, and testing
	    the associated contents for equality.  Normal operation is silent,
	    indicating	failure	 by  a non-zero exit value.  -v prints a brief
	    synopsis of each conflict and a brief  summary.   -V  additionally
	    prints  a  hexadecimal  ASCII  representation  of missing keys and
	    conflicting contents, as in dbCatenate.

       dbCompress [-p] databases ...
	    Compresses databases, reducing  the	 amount	 of  disk  space  they
	    consume.   Compressed  databases  are  readable  only,  and do not
	    support writing or deletion.

       dbCopy [-s size] from-database to-databases ...
	    Copies key/content pairs from from-database, creating to-databases
	    with  block	 size  LEAFSIZE,  as  defined in db.h.	-s changes the
	    block size to size.

       dbDescribe databases ...
	    Prints useful information about  databases,	 including  the	 block
	    size,  the	number of blocks, the number of key/content pairs, the
	    average number of key/content pairs per  block,  and  the  average
	    block usage as a percentage of total block space.

       dbExpand databases ...
	    Reverses  the  compression	performed  on databases by dbCompress.
	    After  expansion,  databases  will	again  support	 writing   and
	    deletion.

DIAGNOSTICS
       In  the event of an error, these commands print a diagnostic message to
       standard error, and exit with a non-zero value.

SEE ALSO
       db(3)

NeXT Computer, Inc.		 June 6, 1989			 dbCatenate(1)
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