ldconfig

Update symlinks and rebuild cache

$ sudo ldconfig

$ sudo ldconfig -n [path/to/directory]

$ ldconfig -p | grep [library_name]

ldconfig [options] [directory...]

ldconfig configures the dynamic linker run-time bindings. It creates the necessary links and cache to the shared libraries found in directories specified in /etc/ld.so.conf, trusted directories (/lib, /usr/lib), and those specified on the command line.
The cache is used by the run-time linker (ld.so) to quickly find shared libraries. Running ldconfig is typically necessary after installing new shared libraries.

-n

Process only specified directories (don't update cache)

Print libraries stored in the cache

Verbose mode

Don't rebuild the cache

Don't update symbolic links

Use specified config file instead of /etc/ld.so.conf

Use specified cache file

Requires root privileges to modify system cache. Must be run after installing new libraries for them to be found. Does not update libraries in non-standard paths not listed in ld.so.conf.

ldconfig is part of the GNU C Library (glibc) and has been essential for dynamic linking on Linux systems since the adoption of shared libraries.

ldd(1), ld.so(8), ld.so.conf(5)