You tried to run ssh -L 8080:localhost:80 user@remote but get an error: "bind: Address already in use". What is the most likely cause and fix?

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Linux CLI - SSH and Remote Access

You tried to run ssh -L 8080:localhost:80 user@remote but get an error: "bind: Address already in use". What is the most likely cause and fix?

ARemote port 80 is blocked; use a different remote port

BLocal port 8080 is already used; choose a different local port

CUser authentication failed; check username and password

DSSH service is not running on remote server

Step-by-Step Solution

Solution:

Step 1: Understand the error message
"bind: Address already in use" means the local port 8080 is occupied by another process.
Step 2: Fix by changing local port
Choose a different unused local port (e.g., 8081) to avoid conflict.
Final Answer:
Local port 8080 is already used; choose a different local port -> Option B
Quick Check:
Port bind error means local port busy [OK]

Quick Trick: Check if local port is free before forwarding [OK]

Common Mistakes:

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