regex - Gnu sed regular expression extension, how to type these two characters? - Ask Ubuntu
Patterns (Regular Expressions) – A Primer for Computational Biology
A Practical Guide to Regular Expressions – Learn RegEx with Real Life Examples
Black Magic Parsing with Regular Expressions (Parsing for Pentesters: Post 2) | Pentest Armoury
regex - how to extract the string from two delimiter strings using sed or awk or bash? - Stack Overflow
How to Use sed Command to Capture Groups in Linux? – Its Linux FOSS
sed examples of capture groups
The Regex warrior: transform a text file in <2 mins | Theodo
How to Use Regular Expressions (RegEx) on Linux - GeeksforGeeks
Patterns (Regular Expressions) – A Primer for Computational Biology
How to Use Regular Expression in Linux? - Scaler Topics
regular-expression · GitHub Topics · GitHub
regex - Negate part of pattern using sed - Stack Overflow
Why `sed` does not return exit status if regex does not matched ? - Unix & Linux Stack Exchange
Manipulating text with sed and grep | Enable Sysadmin
regular expression - RegEx Question on Linux - Sorting Date - Unix & Linux Stack Exchange
GNU BRE/ERE cheatsheet and differences between grep, sed and awk
regular expression - How to make sed regex syntax work as python or javascript? - Unix & Linux Stack Exchange
How to Use sed Command to Capture Groups in Linux? – Its Linux FOSS
How to Use sed Command to Capture Groups in Linux? – Its Linux FOSS
Unix Sed Tutorial: Find and Replace Text Inside a File Using RegEx
 with Regex in SED - Stack Overflow](https://i.stack.imgur.com/x0rQ8.png "bash - Match and Replace  with Regex in SED - Stack Overflow")
bash - Match and Replace  with Regex in SED - Stack Overflow
How to Use sed Command to Capture Groups in Linux? – Its Linux FOSS
Visualizing the "pattern space" and "hold space" in sed : r/commandline
16 Bash Regular Expression (RegEx) Examples Using grep, sed, and awk Commands
