Run a command

strings /usr/lib/adobe-flashplugin/libflashplayer.so|grep LNX|awk '{print $2}'

In webkit-based browsers like Opera, Chrome and Chromium

strings /usr/lib/adobe-flashplugin/libpepflashplayer.so|grep LNX|awk '{print $2}'

In Mageia the command is

strings /usr/lib64/flash-plugin/libflashplayer.so|grep LNX|awk '{print $2}'

To find where libflashplayer.so and libpepflashplayer.so are located, run

locate libflashplayer.so libpepflashplayer.so