How can I run a Spring Boot application on port 80

Question

I can\'t start an application on port 80.

I have tried on my local computer (using my IDE, and on a local server), no luck.

I have checked other similar pos

Answer 1

Use sudo on linux.

I was running a Spring Boot application on Ubuntu and java -jar app.jar --server.port=80 gave me the same error. Since ports below 1024 can only be opened by root access, so use"sudo": sudo java -jar app.jar --server.port=80.

This way of deployment is only suggested for local tests due to security concerns. See comments for details.