Cheat Sheets

Quick-reference cheat sheets for CI/CD and the tools around it.

Printable quick-reference cheat sheets for GitHub Actions, GitLab CI, Docker, kubectl, Helm, and Git - the syntax and commands you look up constantly.

CI platforms

GitHub Actions, GitLab CI.

Cron expressions cheat sheetA cron expressions cheat sheet - the five fields, special characters, common schedules, and ready-to-use exam… GitHub Actions cheat sheetA GitHub Actions cheat sheet - triggers, jobs, steps, contexts, expressions, caching, matrix, and the workflo… Actions contexts cheat sheetA GitHub Actions contexts cheat sheet - github, env, vars, secrets, job, steps, runner, matrix, and needs wit… Actions expressions cheat sheetA GitHub Actions expressions cheat sheet - operators, status functions, string and object helpers, and the ${… Actions triggers cheat sheetA GitHub Actions triggers cheat sheet - on: events, activity types, branch/path/tag filters, schedule cron, a… GitLab CI keywords cheat sheetA GitLab CI keywords cheat sheet - job, rules, needs, cache, artifacts, extends, variables, and the .gitlab-c… GitLab CI cheat sheetA GitLab CI/CD cheat sheet - stages, rules, cache, artifacts, needs, and the .gitlab-ci.yml keywords you use…

Containers & K8s

Docker, kubectl, Helm.

Docker cheat sheetA Docker cheat sheet - build, run, images, volumes, networks, Dockerfile instructions, and compose commands f… Docker CLI cheat sheetA Docker CLI cheat sheet - run, build, ps, exec, logs, images, volumes, networks, and the prune commands for… Docker Compose cheat sheetA docker compose cheat sheet - up, down, build, logs, exec commands plus the compose.yaml service keys you co… Dockerfile instructions cheat sheetA Dockerfile instructions cheat sheet - FROM, RUN, COPY, ENV, ARG, ENTRYPOINT, CMD, HEALTHCHECK, and multi-st… Helm cheat sheetA Helm cheat sheet - install, upgrade, rollback, template, repo, and dependency commands for managing Kuberne… kubectl cheat sheetA kubectl cheat sheet - get, describe, logs, apply, rollout, debug, and context commands for daily Kubernetes…

Version control

Git.

Git branching cheat sheetA Git branching cheat sheet - create, switch, merge, rebase, delete branches, plus fast-forward vs merge comm… Git cheat sheetA Git cheat sheet - branching, committing, rebasing, stashing, undoing mistakes, and the recovery commands th… Git CLI cheat sheetA Git CLI cheat sheet - config, remotes, stash, tags, cherry-pick, bisect, and the plumbing commands beyond t… Semantic versioning cheat sheetA semantic versioning cheat sheet - MAJOR.MINOR.PATCH rules, prerelease and build metadata, and the npm range…

Node & package managers

npm, pnpm, yarn.

npm scripts cheat sheetAn npm scripts cheat sheet - run, ci, install, lifecycle hooks, pre/post scripts, and the npm flags you use i… pnpm cheat sheetA pnpm cheat sheet - install, add, run, frozen-lockfile, workspace filters, and the store commands that make… Yarn cheat sheetA Yarn cheat sheet - install, add, run, workspaces, and the immutable-install flag, covering both Yarn Classi…

Testing

pytest, Jest.

Jest cheat sheetA Jest cheat sheet - matchers, mocks, hooks, async tests, snapshots, and the CLI flags you reach for locally… pytest cheat sheetA pytest cheat sheet - test selection, fixtures, markers, parametrize, assertions, and the CLI flags you reac…

Shell & scripting

bash, sed/awk, jq, curl.

Bash scripting cheat sheetA bash scripting cheat sheet - variables, parameter expansion, test conditions, loops, functions, and strict-… curl cheat sheetA curl cheat sheet - HTTP methods, headers, JSON bodies, auth, downloads, and the flags you use for API calls… Exit codes cheat sheetAn exit codes cheat sheet - what 0, 1, 2, 126, 127, 130, and signal-derived codes mean, and how to read $? in… jq cheat sheetA jq cheat sheet - selectors, filters, map/select, object construction, and the flags for parsing JSON in she… Regex cheat sheetA regex cheat sheet - metacharacters, character classes, quantifiers, anchors, groups, and lookarounds with c… sed & awk cheat sheetA sed and awk cheat sheet - substitution, deletion, field extraction, and the one-liners that power text proc… Signals cheat sheetA Unix signals cheat sheet - SIGTERM, SIGKILL, SIGINT, SIGHUP, default actions, and trapping signals for grac…

Build & IaC

Make, Terraform.

Makefile cheat sheetA Makefile cheat sheet - targets, prerequisites, variables, automatic variables, .PHONY, and the patterns you…

Config & syntax

YAML, regex, cron, semver.

YAML syntax cheat sheetA YAML syntax cheat sheet - scalars, lists, maps, multiline strings, anchors, and the gotchas that break CI c…

Exit codes & signals

Exit codes, signals.

Terraform CLI cheat sheetA Terraform CLI cheat sheet - init, plan, apply, destroy, state, workspace, and fmt commands for everyday inf…

Explore other topics

GitHub ActionsWorkflow, runner, and YAML errors - diagnosed and fixed. Node.js & npmnpm, yarn, and pnpm failures in CI - solved. DockerBuild, run, compose, and registry errors - explained. Pythonpip, poetry, venv, and pytest failures - fixed. Java & JVMMaven, Gradle, and JVM failures in CI - resolved. GoGo build, module, and test failures - diagnosed.