Agent-skills sysadmin-toolbox

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

install

source · Clone the upstream repo

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

Claude Code · Install into ~/.claude/skills/

T=$(mktemp -d) && git clone --depth=1 https://github.com/jdrhyne/agent-skills "$T" && mkdir -p ~/.claude/skills && cp -r "$T/skills/sysadmin-toolbox" ~/.claude/skills/jdrhyne-agent-skills-sysadmin-toolbox && rm -rf "$T"

manifest: skills/sysadmin-toolbox/SKILL.md

source content

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

Bundled Guides

File	Use When
`shell-oneliners.md` in this skill's `references` folder	Need practical commands for: terminal, networking, SSL, curl, ssh, tcpdump, git, awk, sed, grep, find
`cli-tools.md` in this skill's `references` folder	Recommending CLI tools: shells, file managers, network utils, databases, security tools
`web-tools.md` in this skill's `references` folder	Web-based tools: SSL checkers, DNS lookup, performance testing, OSINT, scanners
`security-tools.md` in this skill's `references` folder	Pentesting, vulnerability scanning, exploit databases, CTF resources
`shell-tricks.md` in this skill's `references` folder	Shell scripting patterns and tricks

Safety Boundaries

Do not run destructive system commands, privilege-escalation steps, or offensive tooling unless the user explicitly asked for that scope.
Do not scan hosts, domains, or networks the user does not control or have permission to assess.
Do not assume a command is safe to paste into production without explaining what it does.
Do not persist logs, captures, or credentials outside the user's requested troubleshooting workflow.

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

Keeping Current

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

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

Manual refresh anytime:

./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