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Provided by: man-db_2.4.3-5ubuntu1_i386



        mandb - create or update the manual page index caches


        mandb [-dqsucp|-h|-V] [-C file] [manpath]
        mandb [-dqsu] [-C file] -f filename ...


        mandb  is  used  to initialise or manually update index database caches
        that are usually maintained by man.   The  caches  contain  information
        relevant  to the current state of the manual page system and the infor‐
        mation stored within them is used by the man-db  utilities  to  enhance
        their speed and functionality.
        When  creating  or  updating  an index, mandb will warn of bad ROFF .so
        requests, bogus manual page filenames and manual pages from  which  the
        whatis cannot be parsed.
        Supplying mandb with an optional colon-delimited path will override the
        internal system manual page  hierarchy  search  path,  determined  from
        information found within the man-db configuration file.
        mandb  can  be  compiled  with  support  for  any  one of the following
        database types.
        Name                Type          Async   Filename
        Berkeley db         Binary tree   Yes     index.bt
        GNU gdbm v >= 1.6   Hashed        Yes     index.db
        GNU gdbm v <  1.6   Hashed        No      index.db
        UNIX ndbm           Hashed        No      index.(dir|pag)
        Those database types that support asynchronous updates provide enhanced
        speed at the cost of possible corruption in the event of unusual termi‐
        nation.  In an unusual case where this has occured, it may be necessary
        to  rerun  mandb  with  the  -c  option to re-create the databases from


        -d, --debug
               Produce debugging information.
        -q, --quiet
               Produce no warnings.
        -s, --no-straycats
               Do not spend time looking  for  or  adding  information  to  the
               databases regarding stray cats.
        -p, --no-purge
               Do  not spend time checking for deleted manual pages and purging
               them from the databases.
        -c, --create
               By default, mandb will try  to  update  any  previously  created
               databases.   If  a  database  does not exist, it will create it.
               This option forces mandb to delete previous  databases  and  re-
               create  them  from scratch, and implies --no-purge.  This may be
               necessary if a database becomes corrupt or  if  a  new  database
               storage scheme is introduced in the future.
        -u, --user-db
               Create  user  databases only, even with write permissions neces‐
               sary to create system databases.
        -t, --test
               Perform correctness checks on  manual  pages  in  the  hierarchy
               search  path.   With  this option, mandb will not alter existing
        -f, --filename
               Update only the entries for the given filename.  This option  is
               not  for  general  use; it is used internally by man when it has
               been compiled with the MAN_DB_UPDATES option and  finds  that  a
               page is out of date.  It implies -p and disables -c and -s.
        -C file, --config-file=file
               Use  this  user  configuration  file  rather than the default of
        -h, --help
               Show the usage message, then exit.
        -V, --version
               Show the version, then exit.
        0      Successful program execution.
        1      Usage, syntax, or configuration file error.
        2      Operational error.
        3      A child process failed.


        The following warning messages can be emitted during database building.
        <filename>: whatis parse for page(sec) failed
               An  attempt  to extract whatis line(s) from the given <filename>
               failed.  This is usually due to a poorly  written  manual  page,
               but if many such messages are emitted it is likely that the sys‐
               tem contains non-standard manual pages  which  are  incompatible
               with  the  man-db whatis parser.  See the WHATIS PARSING section
lexgrog(1) for more information.
        <filename>: is a dangling symlink
               <filename> does not exist but is referenced by a symbolic  link.
               Further  diagnostics  are usually emitted to identify the <file‐
               name> of the offending link.
        <filename>: bad symlink or ROFF      .so      request
               <filename> is either a symbolic link  to,  or  contains  a  ROFF
               include request to, a non existent file.
        <filename>: ignoring bogus filename
               The  <filename>  may  or  may not be a valid manual page but its
               name is invalid.  This is usually due to a manual page with sec‐
               tional extension <x> being put in manual page section <y>.
        <filename_mask>: competing extensions
               The  wildcard  <filename_mask>  is  not unique.  This is usually
               caused by the existence of both a  compressed  and  uncompressed
               version  of  the  same manual page.  All but the most recent are


               man-db configuration file.
               A traditional global index database cache.
               An alternate or FSSTND compliant global index database cache.
               An FHS compliant global index database cache.
        The WHATIS PARSING section formerly in this manual page is now part  of


        Wilf. (G.Wilford@ee.surrey.ac.uk).
        Fabrizio Polacco (fpolacco@debian.org).
        Colin Watson (cjwatson@debian.org).


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