What does "connection reset by peer" mean?
Learn what connection reset by peer usually means, which systems trigger it, and which Linux commands to run first.
Read guide Linux TCP Nginx TLS Timeouts
Explain backend and network errors in plain English
Ops Error Atlas turns common production errors into concise guides with probable causes, diagnosis steps, and shell commands worth trying first.
One page per error Short diagnosis steps Shell commands included
- 5 Starter guides ready
- 10 Tool rules in the first build
- 1 week Reasonable launch window
Popular Error Guides
Start with the production failures engineers search most often.
How to diagnose "curl: (28) operation timed out"
Understand cURL error 28, separate DNS, connect, TLS, and response delays, and test each layer with the right command.
Read guideWhy "nginx upstream timed out" happens
Understand what Nginx upstream timed out means and how to check whether the issue sits in the proxy, the app, or the network path.
Read guideFind an error guide
Start with a concrete error message. Keep the query short and exact.
Latest Guides
Focused writeups that explain what the error means and what to try next.
What does "connection reset by peer" mean?
Learn what connection reset by peer usually means, which systems trigger it, and which Linux commands to run first.
Read guideHow to fix "broken pipe" in Linux applications
Understand why broken pipe appears in Linux services and how to confirm whether the peer disconnected first.
Read guideHow to diagnose "curl: (28) operation timed out"
Understand cURL error 28, separate DNS, connect, TLS, and response delays, and test each layer with the right command.
Read guideWhy "nginx upstream timed out" happens
Understand what Nginx upstream timed out means and how to check whether the issue sits in the proxy, the app, or the network path.
Read guideWhat causes TLS handshake failure
Break down TLS handshake failure into certificate, protocol, and cipher mismatches, then verify each assumption with command-line tools.
Read guidePaste an error. Get the likely meaning and next steps.
The first release of the Error Explainer uses a local ruleset, not a large model, so results stay narrow and fast.