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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  generated  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 database 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  license  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 subtree 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 directories 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)



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