I have a Linux application that uses the libsctp.so library. When I run it as root, it runs fine. But when I run it as an ordinary user, it gives the following error: error while loading shared libraries: libsctp.so.1: cannot open shared object file: No such file or directory But, when I do ldd as ordinary user, it is able to see the library: [sanjeev@devtest6 src]$ ldd myapp ... ... libsctp.so.1 => /usr/local/lib/libsctp.so.1 (0x00d17000) [sanjeev@devtest6 src]$ ls -lL /usr/local/lib/libsctp.so.1 -rwxrwxrwx 1 root root 27430 2009-06-29 11:26 /usr/local/lib/libsctp.so.1 [sanjeev@devtest6 src]$ What could be wrong? How is the ldd is able to find libsctp.so, but when actually running the app, it is not able to find the same library?