32 entries
Linux files and navigation cheat sheet
Move around the filesystem, inspect files and find what changed.
Field manual
DevOps cheat sheets
20 references for the commands you reach for on call. Every entry has a worked example and the flags worth knowing, and most name the mistake it invites. Free to read here, and you can run them in the FixOps sandbox.
Linux systems
Files, permissions, processes, logs and storage on one host.
26 entries
Linux permissions and users cheat sheet
Modes, ownership, sudo, groups and ACLs without reaching for 777.
30 entries
systemctl and Linux processes cheat sheet
Find what is running, control services and read unit state.
22 entries
journalctl and Linux logs cheat sheet
Query the journal, follow log files and keep disks from filling.
28 entries
Linux disk and storage cheat sheet
Free space, inodes, mounts, block devices and archives.
30 entries
grep, sed, awk and jq cheat sheet
grep, sed, awk, sort, uniq and jq for slicing logs and data.
34 entries
Bash scripting cheat sheet
Variables, tests, loops, functions and the habits that make a script safe to run twice.
20 entries
SSH cheat sheet
Keys, agents, config, tunnels and fixing permission denied.
Networking & web
Sockets, DNS, HTTP and the reverse proxy in front of it all.
32 entries
Linux networking and DNS cheat sheet
Interfaces, routes, listening sockets, reachability and resolution.
24 entries
curl and nginx cheat sheet
Probe endpoints with curl and run nginx as a safe reverse proxy.
Code & delivery
Version control and the pipelines that ship it.
30 entries
Git cheat sheet
Everyday workflow, history spelunking and undoing mistakes safely.
22 entries
GitHub Actions cheat sheet
Workflow syntax, caching, secrets, environments and debugging runs.
Containers & orchestration
Images, containers, Compose, Kubernetes and Helm.
24 entries
Docker cheat sheet
Build, run, inspect and debug containers and images.
21 entries
Docker Compose cheat sheet
Run multi-container apps locally with one declarative file.
34 entries
kubectl cheat sheet
Inspect, debug, roll out and roll back workloads on a cluster.
22 entries
Helm cheat sheet
Install, upgrade, template and roll back chart releases.
Infrastructure as code
Declarative infrastructure, state and safe change.
23 entries
Terraform cheat sheet
Plan, apply, inspect state and recover from drift without drama.
Observability & response
Metrics, alerts and the on-call playbook.
22 entries
PromQL cheat sheet
Selectors, rates, aggregation, histograms and alert rules.
22 entries
Incident response runbook
Triage checklist, first-five-minutes commands, comms and postmortems.
Security
Secrets, least privilege and supply-chain hygiene.
29 entries
DevOps security and secrets cheat sheet
Handle secrets, scan images, sign artifacts and harden hosts.
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