Linux CLI - Pipes and Redirection
You want to list all files in a directory, filter those containing "report", then sort them in reverse order. Which command correctly uses pipes to do this?
You want to list all files in a directory, filter those containing "report", then sort them in reverse order. Which command correctly uses pipes to do this?
hard📝 Application Q8 of 15
Step-by-Step Solution
Solution:
Step 1: Determine correct command order
First list files withls, then filter withgrep report, finally sort in reverse withsort -r.Step 2: Validate pipe sequence
ls | grep report | sort -r follows correct order. Options A, C, D have commands in wrong order or invalid pipe usage.Final Answer:
ls | grep report | sort -r -> Option CQuick Check:
Logical pipe order = list -> filter -> sort [OK]
Quick Trick: Pipe commands in logical sequence for correct output [OK]
Common Mistakes:
- Sorting before filtering
- Starting with grep without input
- Wrong pipe order
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