$ sudo apt-get update
$ sudo apt-get install php-html-template-it 

php-html-template-it is installed in your system.

Make ensure the php-html-template-it package were installed using the commands given below,

$ sudo dpkg-query -l | grep php-html-template-it *

You will get with php-html-template-it package name, version, architecture and description in a table

php-html-template-it package basic information: