Linux CLI - Text Processing
You want to print lines where the first field contains the substring "cat" anywhere inside it. Which
awk command achieves this?You want to print lines where the first field contains the substring "cat" anywhere inside it. Which awk command achieves this?
hard📝 Application Q8 of 15
Step-by-Step Solution
Solution:
Step 1: Understand substring matching in awk
The operator '~' matches regex pattern anywhere in the field.Step 2: Identify correct pattern for substring
'$1 ~ /cat/' matches lines where first field contains 'cat' anywhere.Final Answer:
awk '$1 ~ /cat/ {print $0}' filename -> Option DQuick Check:
Use '~' for regex substring match [OK]
Quick Trick: Use '~ /pattern/' to match substring in awk [OK]
Common Mistakes:
- Using '==' for substring instead of exact match
- Using '!~' to exclude instead of include
- Misusing index function with wrong condition
Master "Text Processing" in Linux CLI
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