Unable to install easy-rsa package
I was trying to configure OpenVPN server on Ubuntu 16.04.3 however when issued command "apt-get install open vpn easy-rsa" I get
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package easy-rsa is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
E: Package 'easy-rsa' has no installation candidate
What repo do I need to add to install this package?