updated linux resources

Author: learnbyexample

Linux_curated_resources.md

@@ -80,6 +80,7 @@ Collection of resources for Linux command line, shell scripting (mostly `bash`)
 * [General purpose command-line tools](http://www.compciv.org/unix-tools/) — examples for most common usecases
 * [Bash reference cheatsheet](https://devmanual.gentoo.org/tools-reference/bash/index.html) — nicely formatted and explained well
 * [Bash scripting cheatsheet](https://devhints.io/bash) — quick reference to getting started with Bash scripting
+* [GNU BRE/ERE cheatsheet](https://learnbyexample.github.io/gnu-bre-ere-cheatsheet/) — also highlights subtle differences between grep, sed and awk regex flavors
 
 ## Text processing
 
@@ -89,10 +90,9 @@ Collection of resources for Linux command line, shell scripting (mostly `bash`)
     * [CLI text processing with GNU awk](https://github.com/learnbyexample/learn_gnuawk)
     * [Perl One-Liners Guide](https://github.com/learnbyexample/learn_perl_oneliners)
     * [Ruby One-Liners Guide](https://github.com/learnbyexample/learn_ruby_oneliners)
-    * [Command line text processing with GNU Coreutils](https://github.com/learnbyexample/cli_text_processing_coreutils) — `head`, `tail`, `tr`, `sort`, `pr`, `paste`, `join`, etc
+    * [CLI text processing with GNU Coreutils](https://github.com/learnbyexample/cli_text_processing_coreutils) — `head`, `tail`, `tr`, `sort`, `pr`, `paste`, `join`, etc
     * [Command line text processing with Rust tools](https://github.com/learnbyexample/cli_text_processing_rust) — `ripgrep`, `frawk`, `hck`, `huniq`, `zet`, etc
     * [Computing from the Command Line](https://github.com/learnbyexample/cli-computing) — includes several text processing tools
-* [unix.stackexchange: learning resources for grep, sed and awk](https://unix.stackexchange.com/q/2434/109046)
 * [Data Science at the Command Line](https://jeroenjanssens.com/dsatcl/) — Obtain, Scrub, Explore, and Model Data with Unix Power Tools
 * [Data ops on the Linux command line](https://www.datafix.com.au/BASHing/) — analysing, archiving, auditing, cleaning, de-duplicating, etc