What will netstat -tuln | grep ':80' show if a web server is running?

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Linux CLI - Networking Commands

What will netstat -tuln | grep ':80' show if a web server is running?

AActive UDP connections on port 80

BAll established connections on port 80

CListening TCP port 80 with numeric IP

DNo output if server is down

Step-by-Step Solution

Solution:

Step 1: Understand netstat -tuln flags
-t TCP, -u UDP, -l listening, -n numeric addresses.
Step 2: Filter for port 80 with grep
Shows listening TCP port 80 if web server is running.
Final Answer:
Listening TCP port 80 with numeric IP -> Option C
Quick Check:
netstat -tuln + grep ':80' = listening TCP port 80 [OK]

Quick Trick: Use -l to show listening ports, grep for port number [OK]

Common Mistakes:

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