TCPDF for Debian ================ Cache directory --------------- Some functions of TCPDF make use of a cache directory. If your application relies on the default TCPDF configuration, then this directory is /usr/share/php/tcpdf/cache which has been setup as a symlink to /var/cache/tcpdf which is a directory owned by www-data. In the unlikely case, where this is not correct (because your application runs under another user id), you can use dpkg-statoverride to change the permissions of this directory. Support for additional fonts ---------------------------- TCPDF lets you add supplementary font files on the fly. For this to work, you need to have /usr/share/php/tcpdf/fonts writable by your application. In the most likely case, your application is running within a webserver that uses the www-data user. So you can use dpkg-statoverride this way to force the permissions on this directory: $ sudo dpkg-statoverride --add www-data www-data 755 /usr/share/php/tcpdf/fonts