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What will be the output of this command?

medium📝 Command Output Q4 of 15
Linux CLI - Pipes and Redirection
What will be the output of this command?
echo "one two three" | tr ' ' '\n' | wc -l
A0
B3
C1
DError
Step-by-Step Solution
Solution:

  1. Step 1: Break down the command

    echo "one two three" outputs the string. tr ' ' '\n' replaces spaces with new lines, making three lines. wc -l counts lines.

  2. Step 2: Calculate output

    There are three words, so after splitting by new lines, wc -l counts 3 lines.

  3. Final Answer:

    3 -> Option B

  4. Quick Check:

    Pipe output flows correctly = 3 lines [OK]
Quick Trick: Pipe output transforms step-by-step, count lines last [OK]
Common Mistakes:
  • Counting words instead of lines
  • Ignoring tr command effect
  • Expecting error due to escape characters

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