xampp could be start?

xampp could be start?

I installed XAMPP for Linux a couple of days ago and was working fine. Today I do wrongly
 chmod 777 /opt/lampp
then MySQL won't be started. then I completely uninstall XAMPP then again install XAMPP then following message come ::
 Starting XAMPP for Linux 1.8.1...
 XAMPP: Another web server daemon is already running.
 XAMPP: Another MySQL daemon is already running.
 XAMPP: Another FTP daemon is already running.
 XAMPP for Linux started. 
then I tried to stop MySQL by typing::
 sudo service mysql stop
Then It shows that ::
mysql: unrecognized service
then I tried to stop apache server by typing::
 sudo service apach2 stop
Then It shows that ::
 apache2: unrecognized service
Any suggestion ??