Someone knows how to install FileOpen plug-in for read a secure PDF file with Okular, on Ubuntu 16.04? I've bought a DIN standard but to read it we need FileOpen plug-in.
1 Answer
I am not sure if Okular has support for this plugin as it is written for Adobe reader. I was able to download the old Adobe Reader 8 for linux and install the plugin from the FileOpen site. To get the plugin working just untar the archive and copy the FileOpen.AR8.api file to the Adobe Reader 8 plugins folder normally: /opt/Adobe/Reader8/Reader/intellinux/plug_ins/