Download the MySQLTuner save it on your server as "mysqltuner.pl"
wget https://raw.githubusercontent.com/major ... qltuner.pl -o mysqltuner.pl && chmod 755 mysqltuner.pl
OR
https://raw.githubusercontent.com/major ... qltuner.pl
Change the permissions of that file,
#chmod 755 mysqltuner.pl
then, run the above script,
#./mysqltuner.pl
This will gives you the recommendation of MySQL optimization in your server.
Cheers....!
