Dense, scannable quick references. Built for revision, interviews, and on-the-job lookups. No fluff.
Essential Bash commands, redirects, pipes, loops, and one-liners.
Core PowerShell cmdlets, pipelines, and scripting patterns.
Useful Python one-liners, list comprehensions, and quick patterns.
chmod, chown, ACLs, SUID, SGID, and sticky bit explained.
ip, ss, netstat, curl, nmap, and common diagnostics.
SSH config, key management, tunnelling, and SCP.
docker build/run/exec/logs and docker-compose commands.
kubectl get, describe, apply, exec, logs, and context management.
Helm install, upgrade, rollback, and template commands.
az vm, az storage, az network, az group, az ad commands.
aws ec2, aws s3, aws iam, aws cloudformation CLI reference.
Git branching, rebasing, cherry-pick, reset, and stash.
terraform init/plan/apply/destroy, state, and import commands.