[Solved] Given the following command:grep '^root:' /etc/passwd | cut -d':' -f1,3,7What will be the output format? | Linux CLI

Linux CLI - Users and Groups

Given the following command:

grep '^root:' /etc/passwd | cut -d':' -f1,3,7

What will be the output format?

Aroot:/bin/bash

Broot:x:0:0:root:/root:/bin/bash

Croot:0:0

Droot:0:/bin/bash

Step-by-Step Solution

Solution:

Step 1: Understand the command parts
grep '^root:' /etc/passwd finds the line starting with 'root:'. cut -d':' -f1,3,7 extracts fields 1 (username), 3 (UID), and 7 (shell) separated by colons.
Step 2: Identify root line fields
Typical root line: root:x:0:0:root:/root:/bin/bash. Fields: 1=root, 2=x, 3=0, 4=0, 5=root, 6=/root, 7=/bin/bash.
Step 3: Extract fields 1,3,7
Fields 1=root, 3=0, 7=/bin/bash. Joined by colons: root:0:/bin/bash.
Final Answer:
root:0:/bin/bash -> Option D
Quick Check:
Fields 1,3,7 from /etc/passwd line = root:0:/bin/bash [OK]

Quick Trick: Count fields carefully; cut -f1,3,7 picks username, UID, shell [OK]

Common Mistakes:

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