Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add HermeticOrmus/linux-sysadmin-skills --skill sysadmin-performancegit clone --depth 1 https://github.com/HermeticOrmus/linux-sysadmin-skillsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/hermeticormus/linux-sysadmin-skills/sysadmin-performance)<a href="https://agentmods.dev/skills/hermeticormus/linux-sysadmin-skills/sysadmin-performance"><img src="https://agentmods.dev/badge/skills/hermeticormus/linux-sysadmin-skills/sysadmin-performance/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/hermeticormus/linux-sysadmin-skills/sysadmin-performance"><img src="https://agentmods.dev/badge/skills/hermeticormus/linux-sysadmin-skills/sysadmin-performance.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00056 | $0.00620 |
| Opus 5.5 | $0.00022 | $0.00248 |
| Sonnet 5.5 | $0.00011 | $0.00124 |
| Haiku 4.5 | $0.00006 | $0.00062 |
Grade A, and why
sysadmin-performance scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 95 lines — stays where its author put it; the contents beside it link to each section on GitHub.
System performance analysis
Analyze and optimize performance on a Debian/Ubuntu Linux machine. Measure before forming an opinion; tune the bottleneck, not a guess. Confirm before any change that alters kernel parameters, kills processes, or disables services.
Performance analysis steps
1. Current-state assessment
CPU:
top -bn1 | head -20
mpstat 1 5
Look at usage patterns, per-process CPU, and load average.
Memory:
free -h
vmstat 1 5
Look at RAM usage, swap usage, and memory pressure.
Disk:
df -h
iostat -x 1 5
Look at free space, I/O performance, and per-disk utilization.
Network:
ifstat 1 5
netstat -s
Look at throughput, packet statistics, and errors or drops.
Processes:
ps aux --sort=-%mem | head -10
ps aux --sort=-%cpu | head -10
Look for resource hogs, zombie processes, and process states.
2. Identify the bottleneck
Common bottlenecks: CPU saturation, memory exhaustion, disk I/O wait, network congestion, process limits. Name which one the measurements point to before tuning.
3. Optimization strategies
For CPU: identify CPU-intensive processes, check for runaway processes, consider nice/renice, review cron jobs, optimize application code.
For memory: check for leaks, review swap usage, adjust swappiness, kill memory hogs, add RAM if genuinely needed.
For disk: check usage, clean up old files, tune the I/O scheduler, consider an SSD, check for a failing disk with smartctl.
For network: check bandwidth, review firewall rules, tune network settings, check for attacks.
4. System tuning
Kernel parameters in /etc/sysctl.conf: vm.swappiness, fs.file-max, net.core parameters.
Service optimization: disable unused services, tune service configs, review startup items.
Resource limits in /etc/security/limits.conf: open-file limits, process limits, memory limits.
5. Monitoring setup
Set up ongoing monitoring: htop for a real-time view, logging for historical data, alerts for issues, and recorded performance baselines.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 1mo ago First seen · 95 lines · 56 tokens per session scan A 342cab63ef1f
sysadmin-performance is a skill published in the GitHub repository HermeticOrmus/linux-sysadmin-skills (6 stars, last pushed 4mo ago), licensed MIT. It adds 56 tokens to every session and 620 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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