Linux CLI - Text Processing
Which of the following is the correct syntax using a pipe to sort a file named
data.txt and remove duplicate lines?Which of the following is the correct syntax using a pipe to sort a file named data.txt and remove duplicate lines?
easy📝 Syntax Q12 of 15
Step-by-Step Solution
Solution:
Step 1: Understand the order of commands
To remove duplicates correctly, lines must be sorted first so duplicates become adjacent.Step 2: Check each option
sort data.txt | uniq sorts then pipes to uniq, which removes adjacent duplicates. uniq data.txt | sort runs uniq first, which won't remove all duplicates if unsorted. sort -u data.txt uses sort -u which is valid but not the pipe syntax asked. uniq -s data.txt is invalid syntax.Final Answer:
sort data.txt | uniq -> Option AQuick Check:
Sort before uniq to remove duplicates = A [OK]
Quick Trick: Always sort before uniq to remove duplicates correctly [OK]
Common Mistakes:
- Running uniq before sort
- Using invalid uniq options
- Confusing sort -u with uniq
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