You want to create directories named after months inside /backup folder using a single command: jan, feb, and mar. Which command is correct?

hard📝 Application Q9 of 15

Linux CLI - File and Directory Operations

You want to create directories named after months inside /backup folder using a single command: jan, feb, and mar. Which command is correct?

Amkdir /backup/jan; feb; mar

Bmkdir -p /backup/jan,feb,mar

Cmkdir /backup/jan feb mar

Dmkdir /backup/{jan,feb,mar}

Step-by-Step Solution

Solution:

Step 1: Understand brace expansion in shell
The syntax /backup/{jan,feb,mar} expands to create all three directories inside /backup.
Step 2: Check other options
Listing partial paths like mkdir /backup/jan feb mar creates feb and mar in the wrong location. Commas inside mkdir or semicolons are invalid here.
Final Answer:
mkdir /backup/{jan,feb,mar} -> Option D
Quick Check:
Brace expansion creates multiple dirs efficiently [OK]

Quick Trick: Use braces {a,b,c} to create multiple dirs in one command [OK]

Common Mistakes:

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