Install gtml by entering the following commands in the terminal:
sudo apt update sudo apt install gtml
Description:
HTML pre-processor
GTML is an HTML pre-processor which adds some extra features specially designed for maintaining multiple web pages. HTML files generated by GTML are just like any other HTML files. Because GTML does not attempt to interpret your HTML commands in any way, it's fully compatible with all versions of HTML, and does not require any specific browser or server.
Homepage: http://gtml.sourceforge.net/
Version: 3.5.4-23
Section: universe/web