I will be making some changes on my webpages early next year. At the moment I'm using html and I'll be changing it to .shtml. Would the search engines still track my pages after the upgrades? And what about the link exchanges that I've had so far? (all of my link partners are linking to the index.html - when the upgrades take place it'd be index.shtml).
I've also read one post that suggests to mod the .htaccess file, adding: AddHandler server-parsed .html, the problems are I have no idea if my server host supports Apache and there is one .html file in my public_html directory that I want to exclude from being named to .shtml. (I have 60 pages total).
If the file extension will change consistently for all your files, Apache mod_rewrite may be your solution. I'm not an expert so I can't provide the actual code for it. Below are two threads that discuss your specific issue: