$ sudo apt-get update
$ sudo apt-get install ladspa-foo-plugins 

ladspa-foo-plugins is installed in your system.

Make ensure the ladspa-foo-plugins package were installed using the commands given below,

$ sudo dpkg-query -l | grep ladspa-foo-plugins *

You will get with ladspa-foo-plugins package name, version, architecture and description in a table

ladspa-foo-plugins package basic information: