Linux CLI - Text Processing
Which
sed command deletes the 3rd line from a file named data.txt?Which sed command deletes the 3rd line from a file named data.txt?
easy📝 Conceptual Q2 of 15
Step-by-Step Solution
Solution:
Step 1: Recall sed delete syntax
To delete a specific line, use the format 'N d' where N is the line number.Step 2: Match with options
sed '3d' data.txt uses '3d' which means delete line 3. Other options are invalid syntax.Final Answer:
sed '3d' data.txt -> Option BQuick Check:
sed delete line syntax = 'Nd' [OK]
Quick Trick: Use 'Nd' to delete line N in sed [OK]
Common Mistakes:
- Writing 'd3' instead of '3d'
- Using full words like 'delete' which sed doesn't recognize
- Confusing delete command with substitution
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