The 3 A.M. Toolkit: Unix One-Liners for Triaging a Dying Java Service
It’s 3 A.M. PagerDuty is screaming, the error rate graph looks like a hockey stick, and your Java service is dying. You have SSH, a shell, and about ten minutes before someone important wakes up. This is the triage ladder I actually run, in order, with the exact one-liners. The order matters: every step rules out a class of problem before you spend time on the next one. If you did the hardening from the Linux Server Setup post, this is its companion — that one was pre-incident, this one is during. ...