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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find, grep, sed, and awk (wilsonericn.wordpress.com)
submitted 11 months ago by JoeKlemmer@lemmy.myserv.one to c/linux@lemmy.ml
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[–] bizdelnick@lemmy.ml 6 points 11 months ago (1 children)

My 5 cents:

  1. When piping output of find to xargs, always use -print0 option of find and -0 option of xargs. This allows processing files with any allowed characters in names (spaces, new lines etc.). (However I prefer -exec.)

  2. There's an i command to insert a line in sed, it is better to use it instead of s/^/...\n/. It makes code more readable (if we can talk about readability of sed code, huh).

  3. If you want to split a delimiter separated line and print some field, you need cut. Keep awk for more complicated tasks.

[–] meteokr@community.adiquaints.moe 3 points 11 months ago (1 children)
  1. If you want to split a delimiter separated line and print some field, you need cut. Keep awk for 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.txt is 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.

[–] bizdelnick@lemmy.ml 1 points 11 months ago (1 children)

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 with cut -f2.

[–] meteokr@community.adiquaints.moe 3 points 11 months ago

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.