MySQL tuner is a perl script if someone use that it will give suggestions about server’s database. Like which things needs to be optimization mainly It helps to improve database efficiency lastly enhance query performance. So here is the steps how you can also run this MySQL tuner. Login to your ssh client as root user then run the commands below.
cd /usr/src/ && wget https://raw.githubusercontent.com/major/MySQLTuner-perl/master/mysqltuner.pl
Now run the script (MySQL Tuner)
perl mysqltuner.pl