Add some linux resources (#7066)

* add some useful links to text processing section:

- add a detaild link about piping.
- add a detailed link about text filters in general.
- add a basic link for grep beginners.

---------

Co-authored-by: abdulrhman.ali@bld.ai <abdulrhman.ali@bld.ai>

src/data/roadmaps/linux/content/101-editing-files/100-vim.md

@@ -23,3 +23,4 @@ Check out this [Github repo](https://github.com/iggredible/Learn-Vim?tab=readme-
 - [@article@Learn Vim Progressively](https://yannesposito.com/Scratch/en/blog/Learn-Vim-Progressively/)
 - [@video@Vim basics](https://www.youtube.com/watch?v=wACD8WEnImo&list=PLT98CRl2KxKHy4A5N70jMRYAROzzC2a6x&ab_channel=LearnLinuxTV)
 - [@article@Platform to practice Vim](https://vim-adventures.com/)
+- [@article@Vi Cheat Sheet](https://ryanstutorials.net/linuxtutorial/cheatsheetvi.php)

src/data/roadmaps/linux/content/104-text-processing/109-pipe.md

@@ -8,4 +8,8 @@ Here is a simple example of piping two commands, `ls` and `grep`, to list all th
 ls | grep .txt
 ```
 
-In this example, `ls` lists the files in the current directory and `grep .txt` filters out any files that don't end with `.txt`. The pipe command, `|`, takes the output from `ls` and uses it as the input to `grep .txt`. The output of the entire command is the list of text files in the current directory.
+In this example, `ls` lists the files in the current directory and `grep .txt` filters out any files that don't end with `.txt`. The pipe command, `|`, takes the output from `ls` and uses it as the input to `grep .txt`. The output of the entire command is the list of text files in the current directory.
+
+Visit the following resources to learn more:
+
+- [@article@Piping and Redirection](https://ryanstutorials.net/linuxtutorial/piping.php#piping)

src/data/roadmaps/linux/content/104-text-processing/116-grep.md

@@ -18,5 +18,6 @@ There is also an alternative to `grep` - `ripgrep`.
 
 Visit the following resources to learn more:
 
+- [@article@Grep and Regular Expressions for Beginners](https://ryanstutorials.net/linuxtutorial/grep.php)
 - [@article@bgsu.edu: Advanced Grep Topics](https://caspar.bgsu.edu/~courses/Stats/Labs/Handouts/grepadvanced.htm)
 - [@opensource@Ripgrep: Github Repository](https://github.com/BurntSushi/ripgrep)

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

@@ -14,4 +14,8 @@ grep 'Linux' sample.txt
 
 This command will display all the lines in the sample.txt file which contain the word "Linux". 
 
-Overall, the proficiency in text processing is crucial for Linux users as it allows them to automate tasks, parse files, and mine data efficiently.
+Overall, the proficiency in text processing is crucial for Linux users as it allows them to automate tasks, parse files, and mine data efficiently.
+
+Visit the following resources to learn more:
+
+- [@article@Linux Filters](https://ryanstutorials.net/linuxtutorial/filters.php)

src/data/roadmaps/linux/content/114-shell-programming/index.md

@@ -11,4 +11,8 @@ A simple example of a bash shell script:
 # My first script
 echo "Hello, World!"
 ```
-The 'echo' command prints its argument, in this case "Hello, World!", to the terminal.
+The 'echo' command prints its argument, in this case "Hello, World!", to the terminal.
+
+Visit the following resources to learn more:
+
+- [@article@Bash Scripting Tutorial](https://ryanstutorials.net/bash-scripting-tutorial/)