Which of the following commands updates the linker cache of shared libraries?

`mkcache` is not a standard Linux command for updating the linker cache of shared libraries.

`soconfig` is not a recognized command for configuring shared libraries or updating the linker cache.

`mkldconfig` is not a standard Linux command; the correct command for updating the linker cache is `ldconfig`.

`lddconfig` is not a standard Linux command; `ldd` is used to print shared library dependencies, but `ldconfig` updates the cache.

The `ldconfig` command is responsible for creating the necessary links and cache to the most recent shared libraries found in standard directories and those specified in `/etc/ld.so.conf`, which the dynamic linker `ld.so` uses at runtime.