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"Bergen": Port already in use

Scenario: "Bergen": Port already in use

Level: Easy

Type: Fix

Tags: systemd   nginx  

Access: Email

Description: There's an application at /home/admin/standalone that needs to run successfully but currently it fails.

Fix the environment so the binary can run without errors, without changing the binary itself, and without breaking the web app served on port :80.

Root (sudo) Access: True

Test: Running /home/admin/standalone prints OK and curl http://localhost:80 returns hello SadServers.


The "Check My Solution" button runs the script /home/admin/agent/check.sh, which you can see and execute.

Time to Solve: 20 minutes.

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Updated: 2026-08-10 20:20 UTC – 4bf5e0b