🎯

sysadmin-toolbox

🎯Skill

from jdrhyne/agent-skills

What it does

Discovers and recommends CLI tools and shell one-liners for sysadmins, DevOps, and security professionals across network, system, log, and container troubleshooting tasks.

📦

Part of

jdrhyne/agent-skills(14 items)

sysadmin-toolbox

Installation

git cloneClone repository

git clone https://github.com/jdrhyne/agent-skills.git ~/agent-skills

📖 Extracted from docs: jdrhyne/agent-skills

Need more details? View full documentation on GitHub →

1Installs

AddedFeb 4, 2026

View on GitHub Back to Skills

Skill Details

SKILL.md

"Tool discovery and shell one-liner reference for sysadmin, DevOps, and security tasks. AUTO-CONSULT this skill when the user is: troubleshooting network issues, debugging processes, analyzing logs, working with SSL/TLS, managing DNS, testing HTTP endpoints, auditing security, working with containers, writing shell scripts, or asks 'what tool should I use for X'. Source: github.com/trimstray/the-book-of-secret-knowledge"

Overview

# Sysadmin Toolbox

Curated tool recommendations and practical shell one-liners for operational work.

When to Auto-Consult

Load relevant references when user is:

Debugging network connectivity, ports, traffic
Troubleshooting DNS or SSL/TLS
Analyzing processes, memory, disk usage
Working with logs or system diagnostics
Writing shell scripts or one-liners
Asking "what's a good tool for..."
Doing security audits or pentesting
Working with containers/Docker/K8s

Reference Files

| File | Use When |

|------|----------|

| references/shell-oneliners.md | Need practical commands for: terminal, networking, SSL, curl, ssh, tcpdump, git, awk, sed, grep, find |

| references/cli-tools.md | Recommending CLI tools: shells, file managers, network utils, databases, security tools |

| references/web-tools.md | Web-based tools: SSL checkers, DNS lookup, performance testing, OSINT, scanners |

| references/security-tools.md | Pentesting, vulnerability scanning, exploit databases, CTF resources |

| references/shell-tricks.md | Shell scripting patterns and tricks |

Quick Tool Index

Network Debugging

mtr - traceroute + ping combined
tcpdump / tshark - packet capture
netstat / ss - connection monitoring
nmap - port scanning
curl / httpie - HTTP testing

DNS

dig / host - DNS queries
dnsdiag - DNS diagnostics
subfinder / amass - subdomain enumeration

SSL/TLS

openssl - certificate inspection
testssl.sh - TLS testing
sslyze - SSL scanning
certbot - Let's Encrypt

Process/System

htop / btop - process monitoring
strace / ltrace - syscall/library tracing
lsof - open files/connections
ncdu - disk usage

Log Analysis

lnav - log navigator
GoAccess - web log analyzer
angle-grinder - log slicing

Containers

dive - Docker image analysis
ctop - container top
lazydocker - Docker TUI

Operational Gotchas (Recent)

Git commit fails (GPG expired): Use git -c commit.gpgsign=false commit ... or renew your GPG key.
/bin/sh vs bash: wait -n is bash-only; use /bin/bash -lc or a Python ThreadPool fallback for parallel downloads.

Keeping Current

References auto-refresh weekly (Sundays 5am ET) from the upstream repo:

```bash

~/clawd-duke-leto/skills/sysadmin-toolbox/scripts/refresh.sh

```

Manual refresh anytime:

```bash

./scripts/refresh.sh [skill-dir]

```

Example Queries → Actions

"Why is this port not responding?"

→ Load shell-oneliners.md, search for netstat/ss/lsof commands

"What's a good tool for testing SSL?"

→ Load cli-tools.md SSL section, recommend testssl.sh or sslyze

"Show me how to find large files"

→ Load shell-oneliners.md, search for find/ncdu/du commands

"I need to debug DNS resolution"

→ Load shell-oneliners.md dig section + recommend dnsdiag from cli-tools.md

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