I downloaded mysqltuner to use on my ubuntu server and no matter which user I attempt to login with, it responds that my credentials are invalid. I routinely log in as root with my root password and yet it will not recognize it. Does mysqltuner need to be saved in a specific location? do i need to specify 'root'@'something'? What can I be doing wrong?
I'm having the same issue. I can't connect to localhost but I can connect to remote host with this:
mysqltuner --host yourhostname --user youruser