NAME | SYNOPSIS | DESCRIPTION | OPTIONS | FILES | SEE ALSO | COLOPHON
LDCONFIG(8) Linux Programmer's Manual LDCONFIG(8)
/sbin/ldconfig - configure dynamic linker run-time bindings
/sbin/ldconfig [ -nNvXV ] [ -f conf ] [ -C cache ] [ -r root ] directory ...
/sbin/ldconfig -l [ -v ] library ...
/sbin/ldconfig -p
ldconfig creates the necessary links and cache to the most recent shared
libraries found in the directories specified on the command line, in the file
/etc/ld.so.conf, and in the trusted directories (/lib and /usr/lib). The
cache is used by the run-time linker, ld.so or ld-linux.so. ldconfig checks
the header and filenames of the libraries it encounters when determining which
versions should have their links updated.
ldconfig will attempt to deduce the type of ELF libs (i.e., libc5 or
libc6/glibc) based on what C libs, if any, the library was linked against.
Some existing libs do not contain enough information to allow the deduction of
their type. Therefore, the /etc/ld.so.conf file format allows the
specification of an expected type. This is only used for those ELF libs which
we can not work out. The format is "dirname=TYPE", where TYPE can be libc4,
libc5, or libc6. (This syntax also works on the command line.) Spaces are
not allowed. Also see the -p option. ldconfig should normally be run by the
superuser as it may require write permission on some root owned directories
and files.
-v Verbose mode. Print current version number, the name of each directory
as it is scanned, and any links that are created. Overrides quiet
mode.
-n Only process directories specified on the command line. Don't process
the trusted directories (/lib and /usr/lib) nor those specified in
/etc/ld.so.conf. Implies -N.
-N Don't rebuild the cache. Unless -X is also specified, links are still
updated.
-X Don't update links. Unless -N is also specified, the cache is still
rebuilt.
-f conf
Use conf instead of /etc/ld.so.conf.
-C cache
Use cache instead of /etc/ld.so.cache.
-r root
Change to and use root as the root directory.
-l Library mode. Manually link individual libraries. Intended for use by
experts only.
-p Print the lists of directories and candidate libraries stored in the
current cache.
/lib/ld.so run-time linker/loader
/etc/ld.so.conf File containing a list of colon, space, tab, newline, or
comma-separated directories in which to search for
libraries.
/etc/ld.so.cache File containing an ordered list of libraries found in the
directories specified in /etc/ld.so.conf, as well as those
found in /lib and /usr/lib.
ldd(1), ld.so(8)
This page is part of release 3.23 of the Linux man-pages project. A
description of the project, and information about reporting bugs, can be found
at http://www.kernel.org/doc/man-pages/.
GNU 2009-04-15 LDCONFIG(8)