Are you seeing the "Could not increase number of max_open_files to more than X" warning when restarting MySQL in WHM? I was seeing this warning even after changing open_file_limits in my.cnf, but I figured out the solution.
Have a PDF file and need to convert it to a MOBI? This is very simple to do, and I'll show you how. In this example, I'll be using pdf2mobi. This is completely free and requires no software installation.