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updatedb(8)									      updatedb(8)

NAME
       updatedb - update a database for mlocate

SYNOPSIS
       updatedb [OPTION]...

DESCRIPTION
       updatedb creates or updates a database used by locate(1).  If the database already exists,
       its data is reused to avoid rereading directories that have not changed.

       updatedb is usually run daily by cron(8) to update the default database.

EXIT STATUS
       updatedb returns with exit status 0 on success, 1 on error.

OPTIONS
       The PRUNE_BIND_MOUNTS, PRUNEFS, PRUNENAMES and PRUNEPATHS variables, which are modified by
       some of the options, are documented in detail in updatedb.conf(5).

       -f, --add-prunefs FS
	      Add entries in white-space-separated list FS to PRUNEFS.

       -n, --add-prunenames NAMES
	      Add entries in white-space-separated list NAMES to PRUNENAMES.

       -e, --add-prunepaths PATHS
	      Add entries in white-space-separated list PATHS to PRUNEPATHS.

       -U, --database-root PATH
	      Store only results of scanning the file system subtree rooted at PATH to the gener-
	      ated database.  The whole file system is scanned by default.

	      locate(1) outputs entries as absolute  path  names  which  don't	contain  symbolic
	      links, regardless of the form of PATH.

       --debug-pruning
	      Write debugging information about pruning decisions to standard error output.

       -h, --help
	      Write a summary of the available options to standard output and exit successfully.

       -o, --output FILE
	      Write the database to FILE instead of using the default database.

       --prune-bind-mounts FLAG
	      Set PRUNE_BIND_MOUNTS to FLAG, overriding the configuration file.

       --prunefs FS
	      Set PRUNEFS to FS, overriding the configuration file.

       --prunenames NAMES
	      Set PRUNENAMES to NAMES, overriding the configuration file.

       --prunepaths PATHS
	      Set PRUNEPATHS to PATHS, overriding the configuration file.

       -l, --require-visibility FLAG
	      Set  the	"require file visibility before reporting it" flag in the generated data-
	      base to FLAG.

	      If FLAG is 0 or no, or if the database file is readable by "others" or  it  is  not
	      owned  by  mlocate, locate(1) outputs the database entries even if the user running
	      locate(1) could not have	read  the  directory  necessary  to  find  out	the  file
	      described by the database entry.

	      If  FLAG	is  1  or  yes	(the default), locate(1) checks the permissions of parent
	      directories of each entry before reporting it to the invoking user.   To	make  the
	      file  existence truly hidden from other users, the database group is set to mlocate
	      and the database permissions prohibit reading the database  by  users  using  other
	      means than locate(1), which is set-gid mlocate.

	      Note  that  the visibility flag is checked only if the database is owned by mlocate
	      and it is not readable by "others".

       -v, --verbose
	      Output path names of files to standard output, as soon as they are found.

       -V, --version
	      Write information about the version and licence of locate on  standard  output  and
	      exit successfully.

EXAMPLES
       To create a private mlocate database as an user other than root, run
	      updatedb -l 0 -o db_file -U source_directory
       Note  that  all users that can read db_file can get the complete list of files in the sub-
       tree of source_directory.

FILES
       /etc/updatedb.conf
	      A configuration file.  See updatedb.conf(5).

       /var/lib/mlocate/mlocate.db
	      The database updated by default.

SECURITY
       Databases built with --require-visibility no allow users to find names of files and direc-
       tories of other users, which they would not otherwise be able to do.

NOTES
       The  accompanying  locate(1) utility was designed to be compatible to slocate and attempts
       to be compatible to GNU locate where possible.  This is not the case for updatedb.

AUTHOR
       Miloslav Trmac <mitr@redhat.com>

SEE ALSO
       locate(1), mlocate.db(5), updatedb.conf(5)

mlocate 				     Jun 2008				      updatedb(8)
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