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Get Started Free →Server management principles and decision-making. Process management, monitoring strategy, and scaling decisions. Teaches thinking, not commands.
.claude/skills/bilal140202-server-management/SKILL.md| Test case | Without → With | Effect | Δ tokens | Δ turns |
|---|---|---|---|---|
| case-01 | ✗→✓ | ▲ Improved | -9% | 0% |
| case-02 | ✗→✓ | ▲ Improved | -25% | 0% |
| case-12 | ✗→✓ | ▲ Improved | 2% | 0% |
| case-08 | ✓→✗ | ▼ Worse | 31% | 0% |
| case-03 | ✓→✓ | ＝ Same ✓ | -4% | 0% |
> Server management principles for production operations. > Learn to THINK, not memorize commands.
| Scenario | Tool | |----------|------| | Node.js app | PM2 (clustering, reload) | | Any app | systemd (Linux native) | | Containers | Docker/Podman | | Orchestration | Kubernetes, Docker Swarm |
| Goal | What It Means | |------|---------------| | Restart on crash | Auto-recovery | | Zero-downtime reload | No service interruption | | Clustering | Use all CPU cores | | Persistence | Survive server reboot |
| Category | Key Metrics | |----------|-------------| | Availability | Uptime, health checks | | Performance | Response time, throughput | | Errors | Error rate, types | | Resources | CPU, memory, disk |
| Level | Response | |-------|----------| | Critical | Immediate action | | Warning | Investigate soon | | Info | Review daily |
| Need | Options | |------|---------| | Simple/Free | PM2 metrics, htop | | Full observability | Grafana, Datadog | | Error tracking | Sentry | | Uptime | UptimeRobot, Pingdom |
| Log Type | Purpose | |----------|---------| | Application logs | Debug, audit | | Access logs | Traffic analysis | | Error logs | Issue detection |
| Symptom | Solution | |---------|----------| | High CPU | Add instances (horizontal) | | High memory | Increase RAM or fix leak | | Slow response | Profile first, then scale | | Traffic spikes | Auto-scaling |
| Type | When to Use | |------|-------------| | Vertical | Quick fix, single instance | | Horizontal | Sustainable, distributed | | Auto | Variable traffic |
| Check | Meaning | |-------|---------| | HTTP 200 | Service responding | | Database connected | Data accessible | | Dependencies OK | External services reachable | | Resources OK | CPU/memory not exhausted |
| Area | Principle | |------|-----------| | Access | SSH keys only, no passwords | | Firewall | Only needed ports open | | Updates | Regular security patches | | Secrets | Environment vars, not files | | Audit | Log access and changes |
When something's wrong:
| ❌ Don't | ✅ Do | |----------|-------| | Run as root | Use non-root user | | Ignore logs | Set up log rotation | | Skip monitoring | Monitor from day one | | Manual restarts | Auto-restart config | | No backups | Regular backup schedule |
> Remember: A well-managed server is boring. That's the goal.
| Case | Status | Duration (ms) | Turns | Tokens | Tool calls | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Without | With | Δ | Without | With | Δ | Without | With | Δ | Without | With | Δ | ||
case-01 | fail→pass | 14,699 | 7,377 | -50% | 1 | 1 | 0% | 2,631 | 2,397 | -9% | 0 | 0 | — |
case-02 | fail→pass | 25,954 | 13,495 | -48% | 1 | 1 | 0% | 4,382 | 3,285 | -25% | 0 | 0 | — |
case-03 | pass→pass | 17,087 | 12,805 | -25% | 1 | 1 | 0% | 3,119 | 2,999 | -4% | 0 | 0 | — |
case-04 | pass→pass | 9,359 | 5,196 | -44% | 1 | 1 | 0% | 1,737 | 1,789 | +3% | 0 | 0 | — |
case-05 | pass→pass | 12,862 | 12,793 | -1% | 1 | 1 | 0% | 2,000 | 2,861 | +43% | 0 | 0 | — |
case-06 | pass→pass | 12,510 | 7,678 | -39% | 1 | 1 | 0% | 1,738 | 2,107 | +21% | 0 | 0 | — |
case-07 | pass→pass | 14,044 | 10,145 | -28% | 1 | 1 | 0% | 1,905 | 2,525 | +33% | 0 | 0 | — |
case-08 | pass→fail | 21,478 | 16,603 | -23% | 1 | 1 | 0% | 2,469 | 3,245 | +31% | 0 | 0 | — |
case-09 | pass→pass | 14,200 | 9,721 | -32% | 1 | 1 | 0% | 2,653 | 2,868 | +8% | 0 | 0 | — |
case-10 | pass→pass | 13,178 | 7,351 | -44% | 1 | 1 | 0% | 2,238 | 2,364 | +6% | 0 | 0 | — |
case-11 | pass→pass | 15,030 | 13,797 | -8% | 1 | 1 | 0% | 2,610 | 3,283 | +26% | 0 | 0 | — |
case-12 | fail→pass | 16,942 | 12,677 | -25% | 1 | 1 | 0% | 3,044 | 3,100 | +2% | 0 | 0 | — |
case-13 | pass→pass | 10,648 | 7,998 | -25% | 1 | 1 | 0% | 1,945 | 2,468 | +27% | 0 | 0 | — |
case-14 | pass→pass | 16,903 | 10,600 | -37% | 1 | 1 | 0% | 2,819 | 2,850 | +1% | 0 | 0 | — |
case-15 | pass→pass | 15,997 | 11,494 | -28% | 1 | 1 | 0% | 2,539 | 2,832 | +12% | 0 | 0 | — |
case-16 | pass→pass | 12,650 | 8,494 | -33% | 1 | 1 | 0% | 2,059 | 2,330 | +13% | 0 | 0 | — |
case-17 | pass→pass | 23,623 | 8,904 | -62% | 1 | 1 | 0% | 2,089 | 2,182 | +4% | 0 | 0 | — |
case-18 | pass→pass | 12,669 | 12,792 | +1% | 1 | 1 | 0% | 1,878 | 2,277 | +21% | 0 | 0 | — |
case-19 | pass→pass | 19,440 | 17,092 | -12% | 1 | 1 | 0% | 2,533 | 2,957 | +17% | 0 | 0 | — |
case-20 | pass→pass | 10,853 | 10,828 | -0% | 1 | 1 | 0% | 1,967 | 2,751 | +40% | 0 | 0 | — |
case-21 | pass→pass | 8,977 | 7,515 | -16% | 1 | 1 | 0% | 1,799 | 2,455 | +36% | 0 | 0 | — |
case-22 | pass→pass | 3,895 | 3,431 | -12% | 1 | 1 | 0% | 872 | 1,664 | +91% | 0 | 0 | — |
DecimalAI ran this skill against gemini-3.6-flash twice over the same eval suite — once with the skill loaded and once without — and compared the two runs case by case. 22 cases were attempted. The headline lift of +9 percentage points is the difference between those two pass rates over the 22 comparable cases. 1 case got worse with the skill loaded, and it is included in that figure.
Without the skill loaded, the model failed this case. With it loaded, the same prompt on the same model passed. This is one improved case from the latest verified run; every case, including any that regressed, is in the table above.
Other measured skills in the registry, with their headline benchmark lift.