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You are on-call, and the monitoring dashboard screams that the primary application server is at 95% disk usage. You log in, run df -h, and see the roo...
You deploy a new version of your application, and within minutes, the oom-killer starts terminating processes. dmesg shows "Out of memory: Killed proc...
You’re on-call at 2 AM because a production web server just went down. The logs show a Killed process message, and you realize a single runaway Java a...
You’re mid-deploy when the build fails with no space left on device. You check df -h and see the disk is full, but du -sh /var/lib/docker shows it’s o...
You’re staring at your logs, confused. Your database container didn’t crash due to a bug or a bad query; it was simply terminated by the Linux kernel’...
You’re staring at a black screen. Your critical database node just rebooted itself, and /var/log/syslog shows a generic "system rebooted" message with...
You deploy a new microservice, and within an hour, the entire production node goes unresponsive. You SSH in, only to find the system is thrashing. Che...
You receive an alert that your application response time has degraded, but CPU and memory look normal. The root cause is hidden in the kernel: your st...
You’re staring at a dashboard showing high CPU usage, but the application latency spikes are intermittent and don’t correlate with CPU load. You suspe...
You’re staring at a CI pipeline that’s been stuck on docker pull for three minutes. The image is small, the network is fast, but the remote registry (...