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       Module 4: Automation & Scripting
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       1. The Power of the "Pipe" (|)
       
       In Linux, you can take the output of one command and "pipe" it directly into 
       another.
       
       Example: ls /etc | grep ".conf"
       
       Translation: "List everything in /etc, but only show me the lines that contain
       '.conf'."
       
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       2. Redirecting Output (> and >>)
       
       Sometimes you don't want to see the result on the screen; you want to save it 
       to a file.
       
       ls > files.txt: Overwrites files.txt with the list of files.
       ls >> files.txt: Appends the list to the end of the file without deleting what's
       already there.
                                                  
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       3. Bash Scripting 101
       
       A script is just a text file full of commands.
       
       Create a file: nano myscript.sh
       The first line must be the Shebang: #!/bin/bash (This tells Linux to use the 
       Bash interpreter).
       Write your commands.
       Make it executable: chmod +x myscript.sh
       Run it: ./myscript.sh
       
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       Module 4 Practical Challenge: The "Backup" Script
       
       We are going to create a script that simulates a daily backup of your work.
       
       Create the script: Create a file named daily_backup.sh.
       Add the logic: Inside the file, write code that:
       Prints "Starting backup..." to the screen.
       Creates a directory named backups in your home folder (if it doesn't exist).
       Copies all .txt files from your Linux_Basics folder into the backups folder.
       Prints "Backup complete!" and the current date/time (use the date command).
       Run it: Make it executable and run it. Verify the files are actually in the 
       backups folder.
       
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       The Final Step: The Cron Job
       
       A Cron Job is a scheduled task.
       
       Type crontab -e to open your personal schedule.
       
       Each line follows this format: minute hour day month weekday command
       
       Challenge: Add a line to your crontab that runs your daily_backup.sh every day 
       at 3:30 PM. 
       (Hint: It would look something like 30 15 * * * /home/youruser/daily_backup.sh)
       
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