add links for 'awk' (#5801)

src/data/roadmaps/linux/content/104-text-processing/117-awk.md

@@ -13,3 +13,9 @@ awk '{print $1,$2}' filename
 ```
 
 This would display the first and second field (typically separated by spaces) of every line in 'filename'.
+
+Visit the following resources to learn more:
+
+- [IBM.com: Awk by Example](https://developer.ibm.com/tutorials/l-awk1/)
+- [Linux Handbook: Awk](https://linuxhandbook.com/awk-command-tutorial/)
+- [YouTube](https://www.youtube.com/watch?v=9YOZmI-zWok)