Add docs/tech_docs/linux/rename.md

docs/tech_docs/linux/rename.md

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+To convert the recipe name "Slow Cooker Smoky BBQ Chicken Drumsticks" into a more script-friendly format like "Slow_Cooker_Smoky_BBQ_Chicken_Drumsticks", you can use a simple Bash command to replace spaces with underscores. This is a common task when you need to generate filenames or identifiers that require non-spaced strings.
+
+Here’s a straightforward way to do this in Bash, which you can use repeatedly:
+
+### Bash Script
+
+Create a script named `format_recipe_name.sh` with the following content:
+
+```bash
+#!/bin/bash
+
+# This script converts a recipe name with spaces into a format with underscores
+
+# Input: Recipe name as a string
+# Output: Formatted recipe name with underscores
+
+# Function to replace spaces with underscores
+convert_name() {
+    echo "$1" | sed 's/ /_/g'
+}
+
+# Example usage:
+recipe_name="Slow Cooker Smoky BBQ Chicken Drumsticks"
+formatted_name=$(convert_name "$recipe_name")
+echo "Formatted Recipe Name: $formatted_name"
+```
+
+### How to Use the Script
+
+1. **Make the Script Executable:**
+   Open your terminal and run the following command to make your script executable:
+   ```bash
+   chmod +x format_recipe_name.sh
+   ```
+
+2. **Run the Script:**
+   You can now run the script by typing:
+   ```bash
+   ./format_recipe_name.sh
+   ```
+   This will output the formatted name: `Slow_Cooker_Smoky_BBQ_Chicken_Drumsticks`.
+
+### Modifying the Script for General Use
+
+If you want to use the script for any recipe name, you can modify it to accept an input argument:
+
+```bash
+#!/bin/bash
+
+# Function to replace spaces with underscores
+convert_name() {
+    echo "$1" | sed 's/ /_/g'
+}
+
+# Check if an argument is provided
+if [ $# -eq 0 ]; then
+    echo "Usage: $0 'recipe name'"
+    exit 1
+fi
+
+# Convert and output the formatted name
+formatted_name=$(convert_name "$1")
+echo "Formatted Recipe Name: $formatted_name"
+```
+
+Now, you can pass any recipe name as an argument to the script:
+
+```bash
+./format_recipe_name.sh "Slow Cooker Smoky BBQ Chicken Drumsticks"
+```
+
+This flexible script can handle any name you provide, making it easy and repeatable for different recipes or other similar formatting needs.