Following the pattern from /etc/apache2/conf.d/php5.conf (which may or may not be a relic from a previous version, since it was last changed back in 2008 on my system, which was around the time I set up that Linode), you could try with the following in your .htaccess:
Code:
AddType application/x-httpd-php .html .htm
If that doesn't work, you could instead try the following in .htaccess (pattern found in /etc/apache2/mods-available/php5.conf):
Code:
<FilesMatch "\.html?$">
SetHandler application/x-httpd-php
</FilesMatch>
Either of these versions will match both .htm and .html file extensions.