Sysadmin Toolbox

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

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