Linux in a Nutshell, 6th Edition

Name

ldconfig

Synopsis

ldconfig [options] directories

System administration command. Examine the libraries in the given directories, /etc/ld.so.conf.d, /usr/lib, and /lib; update links and cache where necessary. Usually run in startup files or after the installation of new shared libraries.

Options

-C filename

Use filename instead of /etc/ld.so.cache.

-f filename

Use filename instead of /etc/ld.so.conf.

-l

Library mode. Expect libraries as arguments, not directories. Manually link specified libraries.

-n

Suppress examination of /usr/lib and /lib and reading of /etc/ld.so.conf; do not cache.

-N

Do not cache; only link.

-p

Print all directories and candidate libraries in the cache. Used without arguments.

-v

Verbose mode. Include version number, and announce each directory as it is scanned and links as they are created.

-X

Do not link; only rebuild cache.

Files

/lib/ld.so

Linker and loader.

/etc/ld.so.conf

List of directories that contain libraries.

/etc/ld.so.cache

List of the libraries found in those libraries mentioned in /etc/ld.so.conf.