I am working with the standard LAMP web development environment. I wanted to try the TCPDF extensions to PHP to create PDF files. In the Ubunto Software Center I found the installation for "php-tcpdf(6.0.010+dfsg-1)". Following the standard processes in the Software Center, I installed this package. It shows it installed under the "History" category. However, I cannot find the libraries or files anywhere on my system. Does anyone know how to trace where the Software Center has put something that you installed?