bash: lampp: command not found

hi I having a problem with running lampp. When type lampp start i get this message bash: lampp: command not found . can anyone help thanks. how do i fix this problem.
https://community.apachefriends.org/f/
https://community.apachefriends.org/f/viewtopic.php?f=17&t=32972
how do i fix this problem.
When type lampp start
/opt/lampp/lampp start