One important aspect in securing a Linux system is closing any open TCP ports which don't need to be publicly accessible. This reduces the attack surface that the system exposes for malicious actors. In case a service needs to be accessed only locally, a good practice is to bind it on the local lo...

Have you ever encountered a situation where the performance of your PHP script is not great, but you are not sure where the problem is? Then you try to guess and change some part blindly just to see if that would help?

Well, there is a better solution for this, and it is called Xdebug. Actually...