This weekend I tried to do a project that was supposed to use port 5000 of my web server, but no way to succeed. Unfortunately for me it was port 5000 that was already in use… so I decided to kill the current process to be able to do my…

Definition: The ‘Internet of things’ describes physical objects with sensors, processing ability, software, and other technologies that connect and exchange data with other devices and systems over the Internet or other communications networks. These devices range from everyday objects such as vacuum cleaners or telephones to more sophisticated machines in…

This question is a classic and still widely used interview question for many types of software engineering position. It is used to assess a candidate’s general knowledge of how the web stack works on top of the internet. First of all, it is important to specify that this is a…

What are library? In programming, a library is a collection of pre-compiled pieces of code that can be reused in a program. They contain functions that can be reused by developers. Why using libraries in general? Firstly because its functions work, they have been tested and are easy to use. If we have to reuse them it saves…

what is the ls command? —

Hard links A hard link points to the memory where the content of a file is stored regardless of the path to the file. It is a kind of copy. The hard link can only refer to data that exists in the same file system. It has the same inode number as…