Introduction to Astronomical Observation Instruments and Deep Space Photography

In order to be able to observe the night-time cosmos we have to use special precision instruments, such as telescopes, eyepieces frames and cameras …  You will find an introduction to the world of astrophile and amateur astrophotography in this article   Telescopes  The telescope is an optical instrument with which we are able to observe the Universe, capturing …

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How to display passwords entered by browsers or hidden by asterisks in a plain text

All the new generation browsers allow you to store passwords entered by the user, so that you can enter them in the forms the next time you visit the site.  Internet Explorer used to do this, but so do Firefox, Edge, and Chrome as of recently.      For IE and Edge, passwords are encrypted …

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How to display and get the Windows 10 product key for backup or a clean installation

  To display the Windows 10 Product Key  Open a command prompt as administrator, you will find it by right-clicking on the start menu logo. Type the following command:  wmic path SoftwareLicensingService get OA3xOriginalProductKey  and press enter.     Alternative to PowerShell:  open  PowerShell as administrator and execute the commands   Set-ExecutionPolicy RemoteSigned  .\GetProductKey.ps1  The currently installed Windows product key will be displayed.  You …

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How to remove active partition flag in windows systems

If you were in the condition of managing disks and partitions on a Windows system (XP->10), you have surely used the system tool ‘Disk Management’.   In particular, when you create or modify system partitions (those where an operating system is present), you need to mark them as ‘active’.    This operation is not difficult, just right-click on the partition and …

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The evolution of the web from its beginnings until today

THE WEB EXPANDS AT AN INCREDIBLE SPEED, AND BROWSERS OBVIOUSLY HAVE TO KEEP UP WITH IT, ADOPTING NEW TECHNOLOGIES FOR THE VIEWING AND INTERACTION OF CONTENT.   GOOGLE CHROME SINCE 2008 IS COMMITTED TO ALWAYS BE AT THE FOREFRONT, AND FOR ITS BIRTHDAY THE COMPANY HAS DECIDED TO CREATE A SPECIAL PAGE.    To celebrate Chrome’s …

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7 useful functions that a network RaspberryPi can do (FTP-TFTP-WEB-SAMBA-SYSLOG-RADIUS-DHCP)

Let’s see how to set up a Raspberry Pi to use it as a server on your local network. Below you will find a list of commands and actions to perform step by step to configure the device. [1] SERVER FTP mkdir -p /home/pi/files/ chmod 777 /home/pi/files/ sudo bash apt-get install pure-ftpd -y pure-pw useradd pi …

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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) …

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