(Continuation from yesterday)

Apart from that.

I installed a SORACOM device in a Raspberry PI and made a security system for my parent's house. Needless to say, the parent's house is different from my room in my house, naturally.

(Step1) Firstly, because the shape of the HDMI interface was different, I could not connect the Raspberry PI to the display, so I went to buy a converter in the electric shop.

(Step2) When connecting the keyboard, mouse and display to the PI, the power overload (?) causes the PI to go down and start the infinite motion of the reboot (the system might be destroyed).

(Step3) Not to improve the situation, even if the USB power supply was converted, I made SSH environment in the personal computer, and SSH communication was carried out via the WiFi mobile access point, making various PPP environment with building while updating variously , I created an SSH server environment on the the PI.

(Step4) So, I installed SSH client on my personal computer, since there is no LAN cable that directly connects the personal computer and the PI, I ordered the cable to Amazon, addressed to my parents' house,

(Step5)The way of setting fixed address from Ubunts 16.04 has changed to a setting I have never seen before (who decided the crazy setting of "No eth0". I seemed to forget me with anger. Who made this absurd setting file of "/etc/udev/rules.d/70-persistent-net.rules".

(Step 6) So, I installed SSH client on my personal computer. I tried using a cable purchased at Amazon, and as a result, I knew that it was automatically set regardless of cross and straight.

"Well, I knew it. However, if it does not work well, we will want to cling something"

(Step7) I tried logging in the PI from SSH using SORACOM, however, I could not figure out the configuration of the relay server, and eventually time up was coming without achieving the original objectives.

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So, what I want to say, are

"I am a writer (or a columnist) who makes mass produces stupid squirrels,"

At the same time,

"I am also an engineer to attentive to system construction not for money

If even 1% of this power is poured into such things as "personal connections", "heart" or "compassion",I, maybe, will make me a person who can say

"- The world is in my hand"

(*)Stein's Gate Episode 23 "Stein's Gate on the Boundary"

I believe it quite seriously.

In the second girl's school (high school),

- The teacher spent his private expense and bought the book of Simon Lehna Singh to the students,

- showed the "Century of Image" of NHK Special,

- made homework assignments for Lewis Carroll's math problem who was also the author of "Alice in Wonderland"

I have already told the above.

I thought

"Is your school Taoyuan?"

However, it is natural that the view of a child in school is different from the view of an adult parent.

It is not an adult's behavior to "cut out only the phase of an event and tell someone"

Starting with "I can not understand each other," adults are trying to understand each other little by little.

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Well, maybe I think there are a lot of things I didn't know when I was a high school student

However, still, I am an adult who is thinking, "I wish I had burnt that high school."

Today, new my column is released, so I take a day off.

Let's turn over the world by number (63). Extra:

How to make a "virtual silver bullet" for engineers who want to counterattack Corona, even kicking against the pricks

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The theme of the previous column was "despair" and "resignation."

Currently, the "containment strategy" that is being implemented by the governments of each country is a battle that we cannot see the exit easily.

Invisible enemies rampage, and even if we are frustrated or painful, the only thing we can do is "endure".

This kind of struggle to dedicate to exclusive defense causes great anxiety and stress for both individuals and society.

In today's society, even if the economy is stopped for only one day, financial instability can easily occur. However it has been stagnant for more than 2 months.

If there are people who aren't anxious about this, it's something that is no longer "human".

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In contrast, the theme of this column is "Counterattack" and "Hope".

We presented specific examples of counterattacks, not dedicated defense.

"The base sequence of the "siRNA" that cuts the new coronavirus into pieces is already known"

"The blueprint for destroying them (COVID-19) is in our hands"

This is a great hope for me.

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The masterpiece "Bye bye Jupiter" by the late science fiction writer Sakyo Komatsu-sensei, is that

Part of the human race ――To be precise, the field engineers involved in space development ―― confronts the black hole rushing to the sun with an amazing idea

a magnificent science fiction novel.

At first, there was a plan to escape up to 100 million people to 20 billion human beings (and a plan to "exit only for the time being"), but one engineer presents "how to fight against black holes" .

As a result, vitality returns to the field, and the "fight" becomes the last trump card of humankind.

Until now, I had no choice but to escape, and t was just a problem that "Who and who can escape" and "Who will escape and who will remain"

However, as a passive person, going right and left, If we can use a single sword that cut against that "black monster", someone will stand-up again.

Even if it's in vain, if we can get a blow in the "X" bastard, and knock him.

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We haven't lost yet.

The battle for aggressive attacks, not just defense, will start now.

"Even if it's in vain" is NOT

We will wipe out all "COVID-19" from this planet.

I went to see "Rurouni Kenshin the final".

It was a very enjoyable movie.

However, in a discussion with my senior daughter after watching the movie,

I am now on the verge of becoming what is called an "original kitchen", an abomination.

I'd like to refrain from giving my impressions.

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It's been a while since I've watched a movie, but what impressed me the most was

This was the trailer for the movie "Hell's Garden".

I like the "Shimotsuma Monogatari" style.

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Incidentally, I saw "Live-action Rurouni Kenshin" on the flight back from London and "Shimotsuma Monogatari" on the flight back from Singapore.

It seems that the start of my boom often begins with airplanes.

OSS (Open Source Software) is now a commonplace, but its origins can be traced back to fetchmail, emacs, and Linux.

I think the first argument (or rather, column) that presented OSS as "not just a bona fide source code disclosure, but a good software development model" was Eric Daymond's disclosure, "The Cathedral and the Bazaar".

I re-read this today and did not find any reference to the OSS business model here.

However, various business models have now been realized and are already well established.

-----

Well, to see how badly OSS was treated in the beginning, please refer to this article.

'Nowadays, even people who are not familiar with IT know the term, OSS (Open Source Software) -- when this concept was announced to the world, IT engineers around the world (myself included) gasped and said, "Isn't that stupid?'

'The source code of a program is the culmination of software technology. If you make that source code open for anyone to see, it is like giving your work all the way to someone else.

Others include,

At that time, when I was compiling the Linux kernel, my boss said to me, "Ebata! Don't play with a toy OS! I was scolded by him.

-----

And lately, I think...

"Even if the source code is disclosed, I can't read the code written by others after all"

I would like to argue that a theory of "Open Source is nearly equal to Closed Source".

I know well, that,

"The cost of understanding open source code is comparable to the cost of rebuilding open source code from scratch"

It was late this morning that I was able to understand this from the opposite direction this time, by the fact of

'I couldn't understand a hundred lines of someone else's code, but I could instantly recall a thousand lines of my own code that I wrote five years ago.'

In other words, 'open source code maximizes its value when it is paired with its developers.

As a matter of fact, if I am using someone else's open source and a bug arises, I have no desire to debug that code at all.

In such cases, my response is about three things: (1) deal with the problem in operation, (2) abandon the use of the code, or (3) hope the bug does not come up in a workshop at a conference.

-----

Of course, this my experience does not negate a single millimeter of the OSS development and business models that have been discussed.

But for me, my OSS is about

"Collaborative development between me in the past and me in the present"

is the most significant.

------

Professor Leskenen's line from Steins;Gate Zero episode 18,

"This is a timeless collaboration between me and me"

should be added to the significance of OSS development.

WSL2 is awesome -- and now I realize it.

WSL2 is a Windows Box that allows you to use Linux on your Windows Box.

I have long thought that this is a virtual machine (guest OS) with Windows as the host OS -- well, I am not wrong.

So, I assumed that the guest OS would always be "dragged down" by the performance of the host OS -- which is also generally not wrong.

-----

But last year, the person in charge of commissioning the production contacted me and said, 'If you use WSL2, you can improve the performance of the Go language.

Despite our doubts, I actually used the system and confirmed the surprising improvement in performance.

"This is not a host/guest relationship"

I finally realized that.

I looked into it, and I was right.

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Well, I think this alone is great, but I am happy that I can use "sudo apt install" etc. without changing the directory structure of the Windows environment.

I can do the content of the article on development on Linux as it is on Windows, and coding is no problem with the Windows vscode intact -- is this heaven?

I was able to do "sudo apt" and "wget" and install the linux version of java.

For researchers who can't get away from Word or PowerPoint, but still need to develop on Linux, this is the perfect environment.

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So, well, what I'm trying to say is,

When IT engineers use the words 'guest', 'host', 'happy', 'heaven', and 'best', they are talking about the IT development environment.

"They are not talking about juicy story"

I want you to know that.