Linux
systemd Start Request Repeated Too Quickly: Fix start-limit-hit
Fix systemd start-limit-hit by tracing the first service failure, checking unit overrides, permissions and port conflicts, then safely resetting and…
Topic
Server Debugging
7 articles
DevOps
PM2 Node.js Restart Loop: Find the Real Crash
Resolve PM2 app restarting repeatedly with diagnostics, underlying causes, verified fixes and safe recovery steps.
DevOps
Redis Connection Refused: Docker and Linux Networking
Diagnose Redis connection refused fix using commands, root-cause analysis, safe fixes, verification and rollback steps.
DevOps
Node.js Heap Out of Memory: Memory Profiling Guide
Diagnose Node.js heap out of memory using commands, root-cause analysis, safe fixes, verification and rollback steps.
DevOps
Node.js EADDRINUSE Port 3000: Find the Process
Diagnose Node.js EADDRINUSE port 3000 using commands, root-cause analysis, safe fixes, verification and rollback steps.
DevOps
Nginx 504 Gateway Timeout: Trace Slow Upstream Calls
Diagnose Nginx 504 gateway timeout fix using commands, root-cause analysis, safe fixes, verification and rollback steps.
DevOps
Nginx 502 Bad Gateway with Node.js: Broken Upstream
Diagnose Nginx 502 Node.js fix using commands, root-cause analysis, safe fixes, verification and rollback steps.