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Forward data from virtual serial to a network address via TCP socket

Let’s see how to forward data from a virtual serial to a network address.   Step 1 – Choose the serial to use  It is possible to view the list of virtual serial numbers available in the system with the following command:  dmesg | grep tty    Step 2 – Socat  Socat is a very useful tool that is already …

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What are symbolic links between folders and how to use them to increase space on your OS HDD

When we install a large program on Windows, links are created in the registry that help keep track of the real location of the executable files.  For this reason, if we move a program to a secondary partition, it will stop working (the links will stop running).    How do you ensure the continuity of …

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How to calculate hash MD5-SHA1-SHA-256-CRC32 in Windows Linux Mac and online

What they are  Hash are used in computer science to map a string (a sequence of bits) of arbitrary length into a string of predefined length.  It is a sort of ‘signature’ of an electronic document. For each string you can calculate a hash, so each different string will have different hashes.  However, calculating the …

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RAR5 vs RAR4 vs 7ZIP – A quick comparison

Better. zip .7z or .rar?  Often we don’t even pay attention to it, but when we click on a ‘zipper’ file, we are using sophisticated compression algorithms that over the years keep getting better and better.   There are many algorithms and therefore compression formats:  Zipper, Rar, GZip, BZip2, 7z, Tar, Tar.gz …   Among the most popular on Windows we have: 7z, Zip and Rar.  The first and the second one …

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What are DNS, how to configure and protect DNS on Windows

DNS stands for Domain Name System, it is the protocol used globally for domain name translations. What does it mean?  When we type in the name of a website (e.g. spaceclick.com) our computer sends a DNS request to an appropriate server to translate this name into an IP address (e.g. 105.0.0.155). And then it connects to that IP address …

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How to change Ubuntu resolution in VirtualBox

If you have installed Ubuntu Linux in a virtual machine on VirtualBox you will surely realize that by default its resolution is set to 640×480, very poor for any type of use.  You will have also noticed that going on the screen settings it is not possible to change this resolution from the dropdown.      To change the displayed resolution …

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Tutorial RaspberryPi: models – setup – first boot – configuration in a nutshell

A quick guide to the world’s cheapest and best-known Linux-ARM platform  Models – Connections – Setup – Installation – Booting – Configuration commands – Linux commands – Tricks  Introduction  What is Raspberry Pi Raspberry Pi was conceived from the idea of creating a low-cost computer.  In particular, a card that is able to run a linux distribution with …

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