xCHM
Compiled HTML Help (CHM) file viewer for X
xCHM is a viewer for Compiled HTML Help (CHM) files. It can show the contents tree if one is available, print the current page and do the usual history stunts. It allows one to change fonts and search for text in all the pages of the file, or in the page's titles.
xCHM is a viewer for Compiled HTML Help (CHM) files. It can show the contents tree if one is available, print the current page and do the usual history stunts. It allows one to change fonts and search for text in all the pages of the file, or in the page's titles. . xCHM does not support JavaScript in books.
How to install xCHM in Ubuntu
If you are on a supported distro, you can install the application through software center by clicking the below link.
If the above link not working, run the below command in terminal to install xchm in Ubuntu
sudo apt install xchm