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 »
The MAC address (or MAC Address) is used by network cards to identify themselves in the exchange of information. MAC stands for Media Access Control and consists of a 6 byte (48 bit) long code. It is assigned by the manufacturer of the card at the time of its creation and is unique for each …
How to change the MAC address to the network card on Windows Read More »
SOHO – Solar and Heliospheric Observatory EIT 304 EIT 195 EIT 171 EIT 284 LASCO C2 LASCO C3 H-Alpha H-Alpha Contrasted Nobeyama 17 GHz Magnetogram 525.02nm (Fe I) Solar X-rays Geomagnetic Field X-Ray flux Electron flux Proton flux Magnetometer Satellite Environment SOLAR WIND Total Electron Content (TEC) Latest 48h of photon data Solar …
Solar activity in real time with SOHO (NASA ESA NOAA) Read More »
They say that the most used passwords are always the same (example: 123456, password, qwerty, etc. …), or in any case referable to birth dates or memorable moments of someone’s life. Well, using public characters or real places is not a good idea anyway: in fact there are some software (like John the Ripper) that are able to use huge dictionaries, …
How to create a safe and easy to remember password Read More »
How do I choose a password? There are many combinations, some more efficient, some less so; those that reminds us of our real lives should definitely be avoided. Google’s message is clear: “Man’s best friend (the dog) does an exemplary job in protecting your home – so begins an article by Fox Van Allen, writing …
The ten most used (and not to be used) passwords Read More »
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 …
What are DNS, how to configure and protect DNS on Windows Read More »
A computer or any device, when connected to a network (LAN), is identified by an IP address assigned by the router. This address is usually in the form 192.168.X.Y and it is released by the router’s DHCP to identify the various devices connected to it. However, since the router itself is connected to the Internet …
“Eyes on the Solar System” is the name given to the program created by NASA in order to know all the details of the Solar System and space missions. A new interactive website, which combines the technology of interactive video games with data from the American agency, which allows you to navigate between planets, moons and asteroids using …
For the canvases created in WebGL 1.0 there are no problems, all browsers are already automatically compatible. However, if you see a black image, with no possibility to use it, it means that the canvas is managed by WebGL version 2.0 or later. To enable WebGL 2.0 and other experimental versions of WebGL on your …
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 »
