25 years ago, a Finnish university student shared his project on a mailing list:
“It’s a personal hobby,†he said. “It’s not as big and professional as gnu.â€
This child does not know that his operating system will change the software world forever.
Today, Linux dominates the server operating system. It is also the foundation of Android - the mobile operating system. Moreover, it is still 100% free and open source.
Let's go back to the time and look at the 25 little-known facts about Linux over the past 25 years:
Truth 1: There are 115 million lines of code in this Linux Foundation collaboration project. In contrast, Windows XP has only 45 million lines of code.
Truth 2: The Linux kernel project is the most active open source project in the world. It receives an average of 185 patches per day.
Truth 3: About 41,000 people participate in the development of Linux every year. If you want to pay them, you need about $5 billion a year.
Truth 4: In order for Linus Torvalds to continue developing Linux, the Linux Foundation will pay him $10 million a year. His net worth has reached $150 million.
Truth 5: Although there is so much money added, there are so many systems running on Linux, but Linus still works at home, oh, and his cat is accompanying him. The picture below is a photo of his work at his stand-up work desk:
Truth 6: When Linus was still serving in the Finnish army, he was engaged in ballistic calculations. He bought Andrew Tanenbaum's Operating System: Design and Implementation. That book introduces Minix?, a simplified version of Unix for educational purposes. It is this book that opens up Linus's Unix thinking.
Truth 7: Although the first version of Linux was written by Linus, his initial contribution was only less than 1% of all code today. He said that he is now busy merging code and not having to write his own code.
I don't have a five-year plan and I don't have a moon landing plan. I am very happy that people around me can look at the stars and say "I am going there!", but I will look at the bottom of my feet and fill in the pits that I will fall into when I move forward.
- Linus Torvalds
Truth 8: Other famous software figures, such as Bill Gates and Zuckerberg, have given up their studies and devoted themselves to their careers. Linus not only continued to go to school after a certain success in Linux, but also graduated from master's degree.
Truth 9: Although Linus created Git, he never accepts patches through GitHub, even if Linux is on GitHub, and there are as many as 35,000 stars!
Truth 10: The mascot of Linux is a penguin named "Tux":
Truth 11: Developers from companies from all walks of life contribute code to Linux. The following is a ranking by contribution:
Truth 12: 97% of the world's supercomputers run on Linux, including NASA clusters.
Truth 13: SpaceX uses a special fault-tolerant design Linux in its Merlin rocket engine to help complete 32 space missions.
Truth 14: In 2009, the German government of Munich switched from Windows to Linux. They claim to have saved about 10 million euros in software license fees. However, this switch has caused them to lose a lot in terms of productivity.
Truth 15: Linux can run on a mini raspberry pie computer for only $5.
Truth 16: Is Linux the king of the world? Titanic is the first blockbuster to make a Linux server.
Truth 17: Although Gabe Newell, the founder of video game developer Valve, publicly declared that he thinks Linux is the future of the game, his company's Linux-based Steam Machine game console has failed. Compared to 2010, there are fewer people using Linux to play games.
Truth 18: Dronecode is a Linux drone project. About a thousand companies develop their drone products based on this system.
Truth 19: Toyota and Cheetah plan to use automotive-grade Linux (AGL) in their cars in the future.
Truth 20: There are many distributions for Linux, and most distributions are based on other distributions. The most popular distribution is Ubuntu, which is based on Debian.
Truth 21: Red Hat is a company that develops Linux distributions for businesses. It is the largest company in the open source software industry and is preparing to reach a target of $5 billion in revenue this year.
Truth 22: Linux does not necessarily require a graphical interface. Many developers use the command line to manipulate it, such as Bash. You can also choose from a variety of graphical interfaces, such as Xfce and KDE. You may have heard of the word "Xubuntu", which means "Ubuntu with Xfce." You must be able to guess the meaning of "Kubuntu"?
Truth 23: Linux uses a GPL license.
"Most software licenses are designed to take away the freedom to share and modify it. By contrast, the GNU GPL license seeks to defend your freedom to share and modify free software - to ensure that the software is for any of its users. Free."?
-? GNU GPL preface
Truth 24: Linux uses a "Unix-like" design with a single Linux kernel that controls file system, network and process management. The rest of the functionality is controlled by modules - mostly from the GNU project.
Truth 25: Even Microsoft's Windows?, the biggest competitor of Linux, is embracing Linux. It recently integrated Ubuntu Bash into Windows 10.
The truth of the gift: Linux was inspired by Richard Stallman's GNU project, which is a free software movement and hacker ethics. You can learn about these and other important projects such as the Apple I computer from Steven Levy's classic book Hacker.
In addition, there is a simple interview with Linus, who talked about Linux and Git, and how he created them to solve his own problems.
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Application field:
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Operating temperature range:
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The figures stated in the catalog specifications are based on use at ordinary room temperature catalog specifications re based on use at ordinary room temperature (approximately20~25℃.
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Storage temperature range:
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Service life:
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â—A pulse drive ,e.g.,a short break,counter electromotive force,PWM control
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