Linux sed Command Explained: Powerful Text Editing Tricks & Real-World Examples!
Master the sed command in Linux with real-world examples! 🚀 Whether you're a system administrator automating config updates or a developer handling large text files, sed makes text manipulation fast and efficient.
In this tutorial, we break down essential sed commands with practical examples using config.txt and live log monitoring (app.log). No fluff—just real-world Linux use cases!
🔥 What You’ll Learn in This Video:
✔️ Replace text in files instantly with sed
✔️ Modify configuration files like a pro 🛠️
✔️ Delete lines or extract specific data
✔️ Edit logs in real-time with live monitoring 🔍
✔️ Backup files before making changes ✅
🔹 Bonus: See how sed is used in automation & scripting!
📌 Commands Used in This Video:
sed 's/old-text/new-text/' file.txt # Replace text
sed -i 's/old/new/g' config.txt # Replace and save changes
sed '/pattern/d' file.txt # Delete matching lines
sed '5d' file.txt # Delete a specific line
sed -n '5p' file.txt # Print a specific line
tail -f app.log | sed 's/error/warning/g' # Modify log output in real-time
sed -i.bak 's/password123/newpassword/' config.txt # Backup before editing
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