In Level 15 we are given the following description: strace the binary at /home/flag15/flag15 and see if you spot anything out of the ordinary. You may wish to review how to “compile a shared library in linux” and how the libraries are loaded and processed by reviewing the dlopen manpage in depth. Clean up after yourself :) As suggested by the challange, we execute strace: level15@nebula:/home/flag15$ strace ./flag15 execve(".