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Linux / Unix Command: ld.so
Command Library


ld.so, ld-linux.so* - dynamic linker/loader  


ld.so loads the shared libraries needed by a program, prepares the program to run, and then runs it. Unless explicitly specified via the -static option to ld during compilation, all Linux programs are incomplete and require further linking at run time.

The necessary shared libraries needed by the program are searched for in the following order

Using the DT_RPATH dynamic section attribute of the binary if present and DT_RUNPATH attribute does not exist.
Using the environment variable LD_LIBRARY_PATH . Except if the executable is a setuid/setgid binary, in which case it is ignored.
Using the DT_RUNPATH dynamic section attribute of the binary if present.
From the cache file /etc/ld.so.cache which contains a compiled list of candidate libraries previously found in the augmented library path. If, however, the binary was linked with -z nodeflib linker option, libraries in the default library paths are skipped.
In the default path /lib, and then /usr/lib. If the binary was linked with -z nodeflib linker option, this step is skipped.


The dynamic linker can be run either indirectly through running some dynamically linked program or library (in which case no command line options to the dynamic linker can be passed and the dynamic linker which is stored in the .interp section of the program is executed) or directly by running: /lib/ld-linux.so.* [OPTIONS] [PROGRAM [ARGUMENTS]]  


List all dependencies and how they are resolved.
Verify that program is dynamically linked and this dynamic linker can handle it.
--library-path PATH
Override LD_LIBRARY_PATH environment variable setting (see below).
--ignore-rpath LIST
Ignore RPATH and RUNPATH information in object names in LIST.


ldd(1), ldconfig(8).  

Important: Use the man command (% man) to see how a command is used on your particular computer.

>> Linux/Unix Command Library

>> Shell Command Library

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