Cheat sheets
One printable page for each tool. Open any of them without an account or progress.
- AnsibleInventory, ad-hoc commands, playbook structure, variables, handlers, roles, Vault and safe rollout flags.
- AWSIdentity, networking, compute, storage, cost and incident-response commands for AWS.
- AzureIdentity, networking, compute, storage, cost and diagnostics commands for Azure.
- Bash scriptingSafe script headers, variables, conditionals, loops, functions and text-processing one-liners.
- CI/CDPipeline stages, a Jenkinsfile skeleton, deployment strategies, and declarative delivery commands.
- Databases (PostgreSQL)SQL basics, operator queries, indexes and plans, locks, backups, replication, pooling and safe migrations.
- Docker and ComposeRun, build, inspect, clean up and harden containers, plus everyday Compose commands.
- GitEveryday commands for commits, branches, remotes, undoing mistakes, tags and recovery.
- GoToolchain commands, types, errors, interfaces, goroutines, context, HTTP, testing and build flags for services and CLIs.
- Helm for beginnersInstall, configure, upgrade and roll back releases, write templates, package charts and debug failed deployments.
- Helm and KustomizeCharts, releases, values, upgrade and rollback commands, template functions and Kustomize overlays.
- Kuberneteskubectl essentials, manifests, troubleshooting order, RBAC and exam-speed tricks.
- LinuxFiles, permissions, processes, disks, logs and performance commands you reach for daily.
- NetworkingAddressing, DNS, HTTP and TLS checks, and the order to troubleshoot connectivity.
- Prometheus and observabilityMetric types, PromQL patterns, scrape and alert configuration, and the RED, USE and golden-signal checklists.
- PythonEnvironments, core syntax, files, subprocess, HTTP, JSON, cloud SDK, testing and packaging snippets for automation.
- DevSecOps and securityScanning, secrets, signing, container and cluster hardening, cloud identity checks and incident first steps.
- SRE practicesSLO maths, error budget policy, incident roles and updates, postmortem template, toil and reliability patterns.
- systemd and servicesManage services, write unit files, read the journal, schedule with timers and harden services.
- TerraformWorkflow commands, HCL syntax, state operations, meta-arguments and safe pipeline practices.