You want to store the number of files in the current directory into a variable count. Which command correctly does this using command substitution?

hard🚀 Application Q8 of 15

Bash Scripting - Quoting and Expansion

You want to store the number of files in the current directory into a variable count. Which command correctly does this using command substitution?

Acount=`ls | wc -l`

Bcount=$(ls | wc -l)

CBoth A and B

Dcount=ls | wc -l

Step-by-Step Solution

Solution:

Step 1: Understand command substitution for pipeline
Both backticks and $() can capture output of piped commands.
Step 2: Check syntax correctness
Options A and B correctly assign the output of ls piped to wc -l to count.
Final Answer:
Both A and B -> Option C
Quick Check:
Backticks or $() capture piped output = Both A and B [OK]

Quick Trick: Use backticks or $() to capture piped command output [OK]

Common Mistakes:

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