Server's first aid kit: a quick way to determine if your server is alive and well
There are a lot of posts in the internet regarding which program or tool does what in Linux systems. Usually it's a brief overview of the program's functionality, a few examples, and that's it. All from the objective point of view: what we want to achieve. But there aren't so many posts discussing the algorithms in which these programs can be used. So I decided to write a quick guide you can follow to determine whether there's a problem with a server and where it is.