// ~/cheatsheets
Networking Cheatsheets
Scannable reference pages. No fluff. Bookmark and ship.
- // network
IPv4 Subnet / CIDR Cheatsheet
Every CIDR /0–/32 with mask, hosts, wildcard and broadcast.
- // network
Common TCP/UDP Ports Cheatsheet
The ports you actually see in tickets — service, protocol, notes.
- // dns
DNS Record Types Cheatsheet
A, AAAA, CNAME, MX, TXT, SRV and friends — what each one does.
- // http
HTTP Status Codes Cheatsheet
Every status code with category, meaning and when you'll see it.
- // cli
curl Cheatsheet
Flags, JSON, auth, redirects, timing and CI-safe error handling.
- // cli
tcpdump Cheatsheet
BPF filters, the flags worth memorizing, and copy-paste recipes.
- // cli
SSH Cheatsheet
Keys, agent, ~/.ssh/config, port forwarding and jump hosts.
- // text
Regex Cheatsheet
Syntax, anchors, lookarounds, flags and battle-tested recipes.