You run systemctl start nginx but get an error: Failed to start nginx.service: Unit not found. What is the likely cause?

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Linux CLI - Process Management

You run systemctl start nginx but get an error: Failed to start nginx.service: Unit not found. What is the likely cause?

AThe systemctl command is broken

BThe nginx service is already running

CThe nginx service is not installed or the service file is missing

DYou need to use 'enable' instead of 'start'

Step-by-Step Solution

Solution:

Step 1: Interpret the error message
'Unit not found' means systemd cannot find the service definition file for nginx.
Step 2: Identify the cause
This usually means nginx is not installed or its service file is missing.
Final Answer:
The nginx service is not installed or the service file is missing -> Option C
Quick Check:
Unit not found = service missing or not installed [OK]

Quick Trick: 'Unit not found' means service file missing or not installed [OK]

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