Analysis of Linux LD_LIBRARY_PATH

Analysis of Linux LD_LIBRARY_PATH (I) Historical Background nowadays, most of the software comes with a shared library, or for security reasons, or based on commercial considerations such as: ORACLE: $ ORACLE_HOME/lib MySQL: $ HOME/mysql/lib is attached to the oracle user. in bash_profile, set [plain] export LD_LIBRARY_PATH = $ ORACLE_HOME/lib export LD_LIBRARY_PATH = $ scheme:/usr/lib:/usr/X11R6/lib export LD_LIBRARY_PATH = $ scheme: $ ORACLE_HOME/jdk/jre/lib/i386 export LD_LIBRARY_PATH = $ LD_LIBRARY_PATH: $ ORACLE_HOME/jdk/jre/lib/i386/server export LD_LIBRARY_PATH = $ LD_LIBRARY_PATH: $ ORACLE_HOME/rdbms/lib (2) concepts ① the following concepts are similar to those of shared libraries, dynamic link libraries, and ,. so file ② ld. so is also called: the significance of the shared library loader (3) to tell ld. so where can I find someone's shared library? (4. so file management and loading by ld. so is responsible for finding the APP in the standard path/lib or/usr/lib. so, but for non-standard paths: Linux adds private paths to/etc/ld. so. conf, run ldconfig to generate ld. so. cache, ld. so will find this cache UNIX style is to use LD_LIBRARY_PATH to process non-standard paths. so File Search priority is as follows (Linux): ① LD_LIBRARY_PATH environment variable specifies directory ②/etc/ld. so. conf specifies the directory ③ standard path first/usr/lib and then/lib (v) common error: error while loading shared libraries: ooxx. so.0: cannot open shared object file: no such file or directory how ooxx is named here. If you are interested, please refer to the open link (6) general solution (1) to cp these libraries to/usr/lib or/lib. and then ldconfig has a case: click Open link ②/etc/ld. so. conf, then ldconfig ③ LD_LIBRARY_PATH (this variable has been criticized)