this post was submitted on 12 Dec 2024
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Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).
Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.
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I remember that RMS's position is that if someone (!) can change it (eg there is an "update firmware" button), it is a computer and should run free software. If no one can ever change it, it is a circuit. I think that makes some sense.
Many microcontrollers can be set up for in circuit programming.
They might be intended for one time programming in the factory, but solder some wires on in the right place and supply the right signal and it can be reprogrammed.
Is that a circuit or a computer?
It doesn't make any sense. If I make a box with a screen that runs linux (idk for ordering lunch in school canteen) and only update the OS by physically removing the hard drive and installing it from different computer, does that justify it being proprietary?
On the other end a circuit can be changed e.g. by tuning a potentiometer or straight up changing a component. That's not any different than changing a value of a variable in the firmware. There is no actual difference in hardware and software, just different level of abstraction like C vs Python.