You want to find lines in users.txt where the username starts with a vowel and ends with a digit. Which grep -E command achieves this?

hard📝 Application Q8 of 15

Linux CLI - Text Processing

You want to find lines in users.txt where the username starts with a vowel and ends with a digit. Which grep -E command achieves this?

Agrep -E '^[aeiouAEIOU].*[0-9]$' users.txt

Bgrep -E '^[0-9].*[aeiouAEIOU]$' users.txt

Cgrep -E '[aeiouAEIOU].*[0-9]' users.txt

Dgrep -E '^[aeiouAEIOU][0-9]$' users.txt

Step-by-Step Solution

Solution:

Step 1: Define pattern for start and end
Start with vowel: ^[aeiouAEIOU], end with digit: [0-9]$, with any characters in between: .*.
Step 2: Check other options
grep -E '^[0-9].*[aeiouAEIOU]$' users.txt reverses start and end; C lacks anchors; D matches only two characters (vowel then digit) exactly.
Final Answer:
grep -E '^[aeiouAEIOU].*[0-9]$' users.txt -> Option A
Quick Check:
Use ^ and $ to anchor start and end [OK]

Quick Trick: Use ^ for start, $ for end, .* for any chars in between [OK]

Common Mistakes:

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