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this post was submitted on 25 Feb 2024
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Linux
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From Wikipedia, the free encyclopedia
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 don't know how this would be useful to someone reading the cheat sheet, but here's something interesting I just indirectly found out while skimming it through:
Ctrl+Ddoes the same thing asENTER, except the latter additionally sends the end-of-line character to the reader while the former sends nothing;as is the case for shells or interactive programs like the Python REPL,
Ctrl+Dcauses them to terminate only because it sends a string that is 0 characters long, and 0-size reads are universally interpreted as files reaching the end.To test this: enter
cat, type "hello" without pressing enter, thenCtrl+D: you should see "hellohello".An extremely rare case of this being useful would be using netcat to send a string somewhere, without sending the end-of-line byte at the end.
I updated "Log out" to "Exit (sends a signal indicating the end of a text stream)". Which I think is a lot more accurate, and still easy to understand.