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A Linux user's nightmare: the machine was wiped clean with one click
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this post was submitted on 22 Mar 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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Yes! But
-uis for undefined variables. It won't stop a defined variable with an empty value. E.gfoo="".Also
?and:?have the advantage of telling you right then and there where the variable use is that it must be defined or not empty... having to trek back to (likely) the top of the script to check is easily forgotten.