DevOps Cheatsheets.

The complete Linux command reference for DevOps engineers — file system, processes, networking, SSH, systemd, and bash one-liners for production.

Complete Git reference — branching, rebasing, stashing, undoing mistakes, and resolving merge conflicts every engineer hits in production repos.

PromQL query reference — selectors, rate functions, aggregations, alerting rules, and the queries engineers actually run during incidents.

GitHub Actions workflow syntax reference — triggers, jobs, secrets, matrix builds, caching, artifacts, and reusable workflows.

Terraform CLI quick reference — init, plan, apply, state management, workspaces, import, and troubleshooting commands for daily IaC work.

Complete SSH reference — key-based auth, config files, port forwarding, file transfer, and troubleshooting for secure remote access.

Practical Bash scripting reference — variables, conditionals, loops, functions, arrays, and error handling for real automation scripts.

Essential Linux command reference - filesystem, permissions, process management, disk usage, networking, and systemd for daily server work.

Complete Docker CLI reference — image builds, container lifecycle, volumes, networking, Compose, and cleanup commands for daily container work.

Complete kubectl reference - context switching, pods, rollouts, patching, troubleshooting, output formatting, and RBAC for production clusters.