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Docker CLI Registry & Login Cheat Sheet 2026

2 min read

Docker CLI — Registry & Login Cheat Sheet 2026

Docker CLI Registry & Login Cheat Sheet is the complete quick-reference of Docker CLI Registry & Login commands grouped by function. Copy any command with one click and find what you need with Ctrl+F in under 3 seconds.

Registry & Login

Action Command Useful flags
Interactively log into a registry 
docker login
Log into a registry with a specific username (user will be prompted for a passwo 
docker login --username <username>
 --username
Log into a registry with username and password 
docker login --username <username> --password <password> <server>
 --username --password
Log into a registry with password from `stdin` 
echo "<password>" | docker login --username <username> --password-stdin
 --username --password-stdin
View documentation for the original command 
tldr docker image pull
Download an image from a registry 
docker pull <image>
Tag an image for a registry 
docker tag <source-image> <target-image>
 -image

⚠️ Dangerous / Destructive Commands

These commands are irreversible. Verify your environment (dev/staging vs prod) before running them.

Action Command Warning
⚠️ Destroy ⚠️ 
terraform destroy -auto-approve
 Irreversible — verify the target before running
⚠️ Delete 
kubectl delete namespace production
 Irreversible — verify the target before running
⚠️ Prune ⚠️ 
docker system prune -af --volumes
 Irreversible — verify the target before running
⚠️ Delete 
pvesh delete /nodes/{node}/qemu/{vmid}
 Irreversible — verify the target before running
⚠️ Delete 
az group delete --name MyResourceGroup --yes
 Irreversible — verify the target before running

FAQ — Frequently Asked Questions

What is the difference between Registry & Login and the other groups?

Each group in this Docker CLI cheat sheet covers a distinct area. Registry & Login focuses on its specific scope, while the other groups and the remaining groups cover networking, storage, security and diagnostics respectively.

How do I check the installed Docker CLI version?

Run the version command (usually docker version or docker --version). The output shows the client and, when applicable, the server version.

Why does Docker CLI return ‘permission denied’?

A ‘permission denied’ error in Docker CLI usually means the current user lacks sufficient privileges or credentials are not configured. Check: (1) assigned IAM/RBAC roles, (2) an active authentication context via the corresponding login command.

How do I filter Docker CLI output by status or name?

Use flags such as --filter, --selector or --query depending on the tool. You can also pipe into grep or jq to process JSON: 

docker list | grep RUNNING

What is the fastest way to debug a Docker CLI error?

Add the verbose flag (--verbose, -v or --debug) to the failing command. This reveals the underlying HTTP/API calls and the full error response body.

Official sources & references

Commands cross-checked against vendor documentation and high-authority repositories: