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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 ] direc‐
       tory ...
       /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

       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

       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, new‐
			   line, 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 3.22 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)

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