In current script, for Ubuntu, there're process to add ppa boost repository.
I don't remember why I did so because it was a long time ago that I had tested on Ubuntu before.
(I may have read the page that wrote it)
Due to this INVALID repository, apt is not working correctly during installation process of Dependency for ssl-autorefs,
so build for ssl-autorefs fail.
In current script, for Ubuntu, there're process to add ppa boost repository.
I don't remember why I did so because it was a long time ago that I had tested on Ubuntu before.
(I may have read the page that wrote it)
Due to this INVALID repository, apt is not working correctly during installation process of Dependency for ssl-autorefs,
so build for ssl-autorefs fail.
In Ubuntu 18.04 LTS, libboost is in official repository.
So I don't need to add ppa repository for boost.