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NAME | SYNOPSIS | DESCRIPTION | DATABASE CACHES | OPTIONS | EXIT STATUS | DIAGNOSTICS | FILES | SEE ALSO | AUTHOR | COLOPHON |
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MANDB(8) Manual pager utils MANDB(8)
mandb - create or update the manual page index caches
mandb [-dqsucpt?V] [-C file] [manpath]
mandb [-dqsut] [-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
information 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 Hashed Yes 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 termination. In an unusual case where this has occurred, it
may be necessary to rerun mandb with the -c option to re-create the
databases from scratch.
-d, --debug
Print 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
necessary 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
databases.
-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
~/.manpath.
-?, --help
Show the usage message, then exit.
--usage
Print a short usage message and 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
system contains non-standard manual pages which are
incompatible with the man-db whatis parser. See the WHATIS
PARSING section in 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
<filename> 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
sectional 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
ignored.
/usr/local/etc/man_db.conf
man-db configuration file.
/var/cache/man/index.(bt|db|dir|pag)
An FHS compliant global index database cache.
Older locations for the database cache included:
/usr/man/index.(bt|db|dir|pag)
A traditional global index database cache.
/var/catman/index.(bt|db|dir|pag)
An alternate or FSSTND compliant global index database cache.
lexgrog(1), man(1), manpath(5), catman(8)
The WHATIS PARSING section formerly in this manual page is now part
of lexgrog(1).
Wilf. (G.Wilford@ee.surrey.ac.uk).
Fabrizio Polacco (fpolacco@debian.org).
Colin Watson (cjwatson@debian.org).
This page is part of the man-db (manual pager suite) project.
Information about the project can be found at
⟨http://www.nongnu.org/man-db/⟩. If you have a bug report for this
manual page, send it to man-db-devel@nongnu.org. This page was
obtained from the project's upstream Git repository
⟨http://git.savannah.gnu.org/r/man-db.git⟩ on 2018-02-02. (At that
time, the date of the most recent commit that was found in the repos‐
itory was 2018-01-27.) If you discover any rendering problems in
this HTML version of the page, or you believe there is a better or
more up-to-date source for the page, or you have corrections or
improvements to the information in this COLOPHON (which is not part
of the original manual page), send a mail to man-pages@man7.org
2.7.6.1 2016-12-12 MANDB(8)
Pages that refer to this page: apropos(1), lexgrog(1), man(1), whatis(1), man(7), catman(8)
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