What is HTTP 404 Not Found?
The 404 Not Found status code indicates that the server cannot locate the requested resource.
It is one of the most recognisable HTTP status codes and commonly appears when visiting broken links or missing pages.
Common Causes
- Incorrect URLs
- Deleted resources
- Incorrect routing configuration
- Deployment issues
- Missing files
Example
HTTP/1.1 404 Not FoundDevOps Considerations
DevOps engineers often investigate 404 errors when deploying applications, configuring reverse proxies, or managing APIs.
- Check application routes
- Review web server configuration
- Verify deployment files
Summary
404 Not Found means the server cannot find the requested resource.