Show shared library dependency in Linux

在Linux內找某程式所依賴的 library.
#ldd /usr/bin/w

        libproc-3.2.7.so => /lib64/libproc-3.2.7.so (0x00000037afa00000)
        libc.so.6 => /lib64/libc.so.6 (0x00000037b0800000)
        /lib64/ld-linux-x86-64.so.2 (0x00000037af600000)