this post was submitted on 17 Nov 2023
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Linux
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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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My 5 cents:
When piping output of
findtoxargs, always use-print0option offindand-0option ofxargs. This allows processing files with any allowed characters in names (spaces, new lines etc.). (However I prefer-exec.)There's an
icommand to insert a line insed, it is better to use it instead ofs/^/...\n/. It makes code more readable (if we can talk about readability ofsedcode, huh).If you want to split a delimiter separated line and print some field, you need
cut. Keepawkfor more complicated tasks.Depends on the delimiter too! For anyone else reading this, sed accepts many kinds of delimiters.
sed "s@thing@thing2@g" file.txtis valid. I use this sometimes when parsing/replacing text with lots of slashes (like directory lists) so I can avoid escaping a ton of stuff.I know, but it is not the case I was talking about. I meant widely used commands like
awk '{print $2}'that can be replaced withcut -f2.I know you know, as you already demonstrated your higher understanding. I just wanted to add a little bonus trick for anyone reading that doesn't know, and is learning from your examples.
the two are valid and no one is more correct than the other sooo...
agree with one and two and younger me would have agreed with your third point but I think I don't anymore.
yes cut is the simpler and mostly functional tool you need for those tasks.
but it is just so common to need a slight tweak or to want to substitute something or to want to do a specific regex match or weird multi character delimiter or something and you can do it all easily in awk instead of having to pipe three extra times to do everything with the simplest tool.