AWS CLI — IAM & Authentication Cheat Sheet 2026

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

IAM & Authentication

Action	Command	Useful flags
Iam	`aws iam`
Iam list-users	`aws iam list-users`	`-users`
Iam list-roles	`aws iam list-roles`	`-roles`
Iam create-user	`aws iam create-user --user-name newuser`	`--user-name -user`
Iam attach-user-policy	`aws iam attach-user-policy --user-name newuser --policy-arn arn:aws:iam::aws:policy/AmazonS3ReadOnlyAccess`	`--policy-arn --user-name -user-policy`
Cli cheat	`AWS CLI Cheat Sheet for IAM`

⚠️ 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 IAM & Authentication and the other groups?

Each group in this AWS CLI cheat sheet covers a distinct area. IAM & Authentication 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 AWS CLI version?

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

Why does AWS CLI return ‘permission denied’?

A ‘permission denied’ error in AWS 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 AWS 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:

aws list | grep RUNNING

What is the fastest way to debug a AWS 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: