.htaccess

.htaccess is a simple  ASCII  file that make for protect directory web, block ip address and many things that you can do with .htaccess like :

• redirecting a domain without access WWW to WWW

the configuration file like below :
 
Options +FollowSymlinks
RewriteEngine on
rewritecond %{http_host} ^domainanda.com [nc]
rewriterule ^(.*)$ http://www.domainanda.com/$1 [r=301,nc]

• prevent others to see .htaccess and the other files

order allow,deny
deny from all

if you want to prevent for access other file change .htacces name with other name.

• changing error message

if you want to change server page error. you can using .htaccess to defines your own error message .
 
 syntax error example :

ErrorDocument 500 /error.html

change error.html with your own error page.

and many other you can do with .htaccess