ldd command for testing the Linux library dependencies.

For an easy test if the library (.so file in extension) has all the necessary dependencies use the ldd command.

For an example I am using the ZendDebugger.so for debugging the PHP web application.

Zend debugger failed to work. After a quick test I find out the following using this test: ldd ZendDebugger.so

linux-vdso.so.1 =>  (0x00007fff843c0000)

	libssl.so.0.9.8 => not found

	libcrypto.so.0.9.8 => not found

	librt.so.1 => /lib64/librt.so.1 (0x00007f9986dc2000)

	libm.so.6 => /lib64/libm.so.6 (0x00007f9986b3e000)

	libc.so.6 => /lib64/libc.so.6 (0x00007f998679c000)

	libpthread.so.0 => /lib64/libpthread.so.0 (0x00007f9986580000)

	/lib64/ld-linux-x86-64.so.2 (0x0000003840a00000)

This shows the libraries libssl.so.0.9.8 and libcrypto.so.0.9.8 were not found.

After enabling these libraries the ZendDebugger worked.


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