ldd

- print shared object dependencies

ldconfig

 Mainly in the default search directory /lib and /usr/lib And dynamic library configuration files /etc/ld.so.conf Under the directory listed in , Search for shared dynamic link libraries ( The format is as follows lib*.so*), And then create a dynamic loader (ld.so) Required connection and cache files , The cache file defaults to /etc/ld.so.cache,
This file holds an ordered list of DLL names .linux The shared library mechanism under the cache is similar to the cache mechanism , Save library information in /etc/ld.so.cache, When the program connects, it first looks up from this file , And then to ld.so.conf To find . In order to make the DLL shared by the system ,
Need to run dynamic link library management command ldconfig, This executive program is stored in /sbin Under the table of contents .

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