Bash Scripting Mastery: Case Statements, Loops & String Manipulation (Automation Guide)
Automate Like a Linux Pro Learn to use case statements, loops, and string operations to write efficient, powerful Bash scripts. Perfect for beginners, sysadmins, and developers
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🔍 What You’ll Master:
✅ Case Statements (Switch-Case Alternative)
Handle multiple conditions cleanly:
bash
Wildcards () and real-world use cases (OS detection, menu systems).
✅ Bash Loops: For, While, Until
For Loops:
Range-based: for i in {}; do...
C-style: for (())
Array iteration: fruits=("Apple" "Mango")
While Loops:
Single/multiple conditions: while [ $counter -le 5 ]
Infinite loops: while true; do...
Until Loops:
Retry tasks until success: until [ -f "download.zip" ]; do...
Break & Continue: Control flow like a pro!
✅ String Manipulation
Check equality, emptiness, and patterns: [[ "$str1" == "$str2" ]]
Slice strings: length=${#text} (validate passwords, parse logs).
Real-world examples:
bash
if [[ ${#password} -lt 8 ]]; then
echo "Password too short!"
fi
🎯 Who Is This For?
Beginners: Start scripting with confidence.
Sysadmins: Automate repetitive tasks.
Developers: Build robust CLI tools.
Linux Enthusiasts: Level up your terminal skills.
🚀 Why Watch?
Zero Fluff: Straight-to-the-point examples.
Free Cheat Sheet: Downloadable Bash loop/string syntax guide (link in pinned comment).
Real-World Demos:
Automate package installation based on OS.
Retry failed downloads until success.
Validate user input with string checks.
💻 Script Smarter, Not Harder
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