Docker Dockerfile

Command	What it does
docker ps	List running containers
docker ps -a	List all containers, including stopped
docker images	List local images
docker build -t name:tag .	Build an image from a Dockerfile
docker run -d -p 8080:80 name	Run a container in the background with a port mapped
docker exec -it <id> sh	Open a shell inside a running container
docker logs -f <id>	Stream a container's logs
docker system prune -a	Remove unused images, containers, and networks
docker compose up -d	Start services defined in compose.yaml

→ full install guide

Kubernetes deployment.yaml

Command	What it does
kubectl get pods -A	List pods in every namespace
kubectl get nodes -o wide	List cluster nodes with details
kubectl apply -f file.yaml	Create or update resources from a manifest
kubectl describe pod <name>	Show events and status for a pod
kubectl logs -f <pod>	Stream logs from a pod
kubectl exec -it <pod> -- sh	Open a shell inside a pod
kubectl rollout restart deploy/<name>	Restart a deployment's pods
kubectl scale deploy/<name> --replicas=5	Scale a deployment
kubectl config use-context <ctx>	Switch cluster context

→ full install guide

Ansible playbook.yml

Command	What it does
ansible all -m ping -i inventory	Check connectivity to all hosts
ansible-playbook site.yml	Run a playbook
ansible-playbook site.yml --check	Dry-run without making changes
ansible-playbook site.yml --limit web	Run against one host group
ansible-vault encrypt secrets.yml	Encrypt a file with Ansible Vault
ansible-galaxy install role_name	Install a role from Galaxy
ansible-inventory --list	Print the resolved inventory as JSON

→ full install guide

Terraform main.tf

Command	What it does
terraform init	Download providers and set up the backend
terraform plan	Preview changes before applying
terraform apply	Apply changes to reach the desired state
terraform destroy	Tear down everything the state manages
terraform fmt -recursive	Auto-format .tf files
terraform validate	Check configuration syntax
terraform state list	List resources tracked in state
terraform import addr id	Bring an existing resource under management

→ full install guide

Jenkins Jenkinsfile

Command	What it does
systemctl status jenkins	Check service status (Linux)
java -jar jenkins-cli.jar -s URL list-jobs	List jobs via the CLI
curl -X POST JENKINS_URL/job/NAME/build	Trigger a build via the REST API
Jenkinsfile: pipeline { agent any ... }	Minimal declarative pipeline skeleton
sh 'command'	Run a shell step inside a pipeline stage
archiveArtifacts artifacts: 'build/**'	Save build output as an artifact

→ full install guide

Git .gitconfig

Command	What it does
git status	Show changed and staged files
git switch -c feature/x	Create and switch to a new branch
git add -p	Interactively stage hunks
git commit -m "message"	Commit staged changes
git rebase -i HEAD~5	Interactively edit the last 5 commits
git stash / git stash pop	Shelve and restore uncommitted work
git log --oneline --graph --all	Compact visual history of all branches
git bisect start	Binary-search commits for a regression

→ full install guide

Nginx nginx.conf

Command	What it does
sudo nginx -t	Test config syntax before reloading
sudo systemctl reload nginx	Reload config without dropping connections
sudo systemctl status nginx	Check service status
tail -f /var/log/nginx/access.log	Follow access logs
tail -f /var/log/nginx/error.log	Follow error logs
nginx -V	Show compiled-in modules and build flags
proxy_pass http://backend;	Forward requests to an upstream in a server block

→ full install guide

Prometheus prometheus.yml

Command	What it does
up	PromQL: 1 for targets currently reachable
rate(http_requests_total[5m])	Per-second request rate over 5 minutes
histogram_quantile(0.95, ...)	Compute the 95th percentile from a histogram
promtool check config prometheus.yml	Validate a config file
curl localhost:9090/-/reload	Hot-reload config (needs --web.enable-lifecycle)
curl localhost:9100/metrics	Read raw metrics from node_exporter

→ full install guide

Grafana dashboard.json

Command	What it does
localhost:3000	Default web UI address (admin/admin on first login)
grafana-cli plugins install <id>	Install a plugin from the catalog
sudo systemctl status grafana-server	Check service status
/etc/grafana/grafana.ini	Main server config file
/var/lib/grafana/grafana.db	Default SQLite store for dashboards & users
Dashboards > Export > Save JSON	Export a dashboard for version control

→ full install guide

Helm Chart.yaml

Command	What it does
helm repo add name url	Add a chart repository
helm search repo keyword	Search added repositories
helm install release chart	Install a chart as a named release
helm upgrade --install release chart	Install or upgrade in one command
helm rollback release 1	Roll back to a previous revision
helm list -A	List releases across all namespaces
helm uninstall release	Remove a release
helm template chart	Render manifests locally without installing

→ full install guide

AWS CLI credentials

Command	What it does
aws configure	Set access key, secret, region, and output format
aws sts get-caller-identity	Confirm which identity/account you're using
aws s3 ls	List S3 buckets
aws s3 sync ./dir s3://bucket/path	Sync a local directory to S3
aws ec2 describe-instances	List EC2 instances and their state
aws --profile name <cmd>	Run a command against a named profile
aws logs tail /log/group --follow	Stream CloudWatch logs

→ full install guide

Vault vault-config.hcl

Command	What it does
vault server -dev	Run a throwaway dev server (never for production)
export VAULT_ADDR='http://127.0.0.1:8200'	Point the CLI at a Vault server
vault login	Authenticate the CLI session
vault kv put secret/app key=value	Write a KV secret
vault kv get secret/app	Read a KV secret
vault policy write name policy.hcl	Upload an access policy
vault operator unseal	Unseal a Vault after startup

→ full install guide

Consul consul.hcl

Command	What it does
consul agent -dev	Run a single-node dev agent
consul members	List cluster members and their status
consul catalog services	List registered services
consul kv put key value	Write to Consul's key/value store
consul connect proxy -sidecar-for app	Run a mesh sidecar proxy for a service
consul operator raft list-peers	Inspect the Raft consensus peers

→ full install guide

Podman Containerfile

Command	What it does
podman ps	List running containers
podman run -d -p 8080:80 name	Run a container in the background
podman build -t name:tag .	Build an image from a Containerfile
podman pod create --name app	Create a pod grouping several containers
podman generate systemd --name app	Generate a systemd unit for a container
podman machine start	Start the Linux VM backing Podman on macOS

→ full install guide

Argo CD application.yaml

Command	What it does
argocd login HOST	Authenticate the CLI against a server
argocd app list	List managed applications
argocd app sync my-app	Force a sync from Git to cluster
argocd app get my-app	Show sync status and diff
argocd app set my-app --sync-policy automated	Enable auto-sync for an app
kubectl -n argocd get pods	Check the health of Argo CD's own pods

→ full install guide

GitHub CLI config.yml

Command	What it does
gh auth login	Authenticate the CLI with a GitHub account
gh repo clone owner/repo	Clone a repository
gh pr create --fill	Open a pull request from the current branch
gh pr list	List open pull requests
gh pr checkout 123	Check out a PR by number
gh issue list	List open issues
gh workflow run name.yml	Trigger a GitHub Actions workflow
gh release create v1.0.0	Cut a new release

→ full install guide

Vagrant Vagrantfile

Command	What it does
vagrant init hashicorp/bionic64	Create a Vagrantfile for a base box
vagrant up	Create and boot the VM
vagrant ssh	SSH into the running VM
vagrant halt	Stop the VM
vagrant destroy	Delete the VM entirely
vagrant status	Show current VM state
vagrant provision	Re-run provisioning scripts on a running VM

→ full install guide

Packer template.pkr.hcl

Command	What it does
packer init .	Download required plugins for a template
packer validate template.pkr.hcl	Check a template for errors
packer build template.pkr.hcl	Build the image(s) defined in a template
packer fmt -recursive	Auto-format HCL templates
packer console	Interactively evaluate HCL expressions

→ full install guide