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LDCONFIG(8)                         Linux Programmer's Manual                         LDCONFIG(8)

       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 used only 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     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

       -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-sepa‐
                           rated 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

       ldd(1), ld.so(8)

       This  page  is  part of release 3.74 of the Linux man-pages project.  A description of the
       project, information about reporting bugs, and the latest version of  this  page,  can  be
       found at http://www.kernel.org/doc/man-pages/.

GNU                                         2012-05-10                                LDCONFIG(8)

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