define htaccess ?
Hypertext Access, commonly shortened to htaccess, is a powerful configuration file which controls the directory it is placed in and all the subdirectories underneath it.
.htaccess is a configuration file for use on web servers running the Apache Web Server software. When a .htaccess file is placed in a directory which is in turn ‘loaded via the Apache Web Server’, then the .htaccess file is detected and executed by the Apache Web Server software.