linux

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 …

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

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 …

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

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 …

How to change Ubuntu resolution in VirtualBox Read More »

How to create a shared folder on linux in few step

A simple guide to create a shared folder accessible and writable from any device on the local network.  Valid for Ubuntu, Debian, RaspberryPi, etc…  Warning: this is one of the simplest and shortest procedures and creates a public folder; to create folders with users and passwords the procedure is more complicated.   1. install samba sudo apt-get …

How to create a shared folder on linux in few step Read More »

Install and configure Apache web-server on Ubuntu or Debian (RaspberryPi)

To create an Apache-based web server, using a common Ubuntu or Debian machine, proceed as follows.   1. Install Apache  sudo apt-get update  sudo apt-get install apache2  To check if it’s correctly installed, go to the site  localhost  you should find ‘It works!  2. Configuration   All configuration files can be found in  “/etc/apache2”  this can be displayed via …

Install and configure Apache web-server on Ubuntu or Debian (RaspberryPi) Read More »

How to access shared Virtualbox folders from Ubuntu or generally from Linux

If you are using VirtualBox frequently, you will have found yourself in the situation of having to move files from the Host machine (the main system) to the Guest machine (the emulated system).   To do this, if you use Windows as Guest (in the VM), there are no problems.  In this case it will …

How to access shared Virtualbox folders from Ubuntu or generally from Linux Read More »

How to check if an email address exists an is reachable

This is a common occurrence where you receive at least one rejection email with the following Message Delivery Status (or Subsystem), as a result of sending it to a problematic or non-existing address.   So to check if an address actually exists or  ‘receives’ mail you could simply send an email to that address (with the ‘delivery notification’ flag active) …

How to check if an email address exists an is reachable Read More »

How to replace the Debian desktop on RaspberryPi

While using your RaspberryPi intensively, you may find yourself in an unfortunate situation where the X server fails to boot up.  There may be several causes: a crash, deletion of system files, or a failed update.    In all cases, when starting up, you would see an error like the one below, which notifies us of the failure to start …

How to replace the Debian desktop on RaspberryPi Read More »

Share on Social Media
Scroll to Top