Monday, 24 February 2020

Wash my Bash

An effective title to explain my personal script to clean and obtain free space on my personal disk.
I want to show you all this script to delete something annoying:

df -h
sudo apt-get autoremove
sudo apt-get autoclean
sudo apt-get clean
sudo apt-get purge `deborphan`
df -h


This script is composed of 4 parts in turn composed of as many commands:

  • autoremove 1: the autoremove option removes packages that were automatically installed because some other package required them but, with those other packages removed, they are no longer needed;
  • autoclean 2:clears the local repository of retrieved package files, but it only removes files that can no longer be downloaded and are virtually useless. It helps to keep your cache from growing too large;
  • clean 3: clears out the local repository of retrieved package files.It removes everything but the lock file from /var/cache/apt/archives/ and /var/cache/apt/archives/partial/;
  • purge `deborphan` 4: To delete unnecessary libraries

1 https://www.networkworld.com/article/3453032/cleaning-up-with-apt-get.html
2 https://www.networkworld.com/article/3453032/cleaning-up-with-apt-get.html
3 https://askubuntu.com/questions/894736/what-is-sudo-apt-get-clean
4 https://sites.google.com/site/easytipsforlinux/using-deborphan

Wednesday, 11 December 2019

Quirky

Quirky it's a new word for me. It has the same meaning of "crazy" but with a positive value. Or, better, it's like a disruptive force that choose not to follow the middle mind and decide to generate a new way to do the things.

This is my personal interpretation of the first 60 pages I've read up to now.

This book is something that a visionary cannot wait to read. The life (and not only) of: Elon Musk, Albert Einstein, Nikola Tesla, Thomas Edison, Benjamin Franklin, Marie Curie, Dean Kamen and Steve Jobs.
I would call this book this way: "The revenge of nerds" like a famous movie from the 80s that I saw as a child.

Sunday, 11 August 2019

NOAA weather satellite image signal capture (part II)

Building the antenna
Now we have everything to build our antenna. So, we take a couple of axis made of wood. Indeed, our antenna needs of a wooden support on which to place the cables.

You have to cut a pair of copper of 53 cm longer wires and connect them through an electrict connector to the coaxial cable.

Our antenna
Now, we have to connect the other end to the receiver:



Connection done!

This is a picture referred to the simple antenna made up of two crossed woden axis (at 120°):

Project design (handmade!)

And the antenna realised, I suggest placing it in a free obstacle zone:

V-antenna!

No obstacles near there

120° angle between the two axises

The way in which the couple of wires as conjuncted to the antenna cable

Obtaining a single piece of this electric junction is very simple: you can cut the original strip in the single piece you need.

The final relization in all of its length

continue...

Monday, 8 July 2019

NOAA weather satellite image signal capture (part I)

Here is my last experiment, partially completed. I said "partially" because I recived not a perfect result as I'd would prefer.

Start!
There are three NOAA satellites that spread their signal all over the world in broadcast without any form of cryptography: I can simply obtain this signal using an antenna, a receiver and a PC.

Receipt
What do I need? This is the necessary hardware list:

Receiver (you have to plug it in the PC).

Use this cable to connect you receiver to the antenna cable.

  • a PC.


...continue!

Thursday, 4 July 2019

Pen and Paper (Evolution)

This is the second versione of the previous projest regarding the "Air Pollution Experiment".
Soon the realization...stay tuned!
New versione of the project for the "Air Pollution Experiment"