if is xampp ubuntu run this 

sudo netstat -tnlp | grep :80

get the PId

sudo kill -9 1802;sudo /opt/lampp/lampp start

sudo /opt/lampp/lampp start

cd /opt/lampp/

ls

sudo ./manager-linux-x64.run 

sudo /opt/lampp/lampp start

​

sudo /opt/lampp/lampp stop

 sudo '/opt/lampp/xampp' start

 sudo '/opt/lampp/xampp' reload

 sudo '/opt/lampp/xampp' restart

 sudo '/opt/lampp/xampp' stop

​

# open terminal 

Ctrl+Alt+T

​

# then type below command

sudo /opt/lampp/lampp start

​

# open terminal 

Ctrl+Alt+T

​

# then type below command

sudo /opt/lampp/lampp start

sudo /opt/lampp/./manager-linux-x64.run

wget https://www.apachefriends.org/xampp-files/<version>/xampp-linux-x64-<version>.tar.gz