Unix Command: ldd

he ldd command prints the shared libraries required by each program. It quickly tests library dependencies for the different executables. E.g.:

username@neser:rhel:fen3:/opt/share/paraview/4.1.0/x86_64/bin$ ldd pvserver 
linux-vdso.so.1 =>  (0x00007fff25fd4000)
libmpi.so.1 => /opt/share/openmpi/1.5.4/x86_64-gcc/lib/libmpi.so.1 (0x00002b811ef86000)
libdl.so.2 => /lib64/libdl.so.2 (0x0000003a43200000)
libpthread.so.0 => /lib64/libpthread.so.0 (0x0000003a43600000)
libc.so.6 => /lib64/libc.so.6 (0x0000003a42a00000)
libnsl.so.1 => /lib64/libnsl.so.1 (0x0000003a46e00000)
libutil.so.1 => /lib64/libutil.so.1 (0x0000003a44600000)
libm.so.6 => /lib64/libm.so.6 (0x0000003a42e00000)
/lib64/ld-linux-x86-64.so.2 (0x0000003a42600000)