AWS

AWS CLI Quick Reference

AWS CLI setup, profiles, S3, EC2, and IAM commands.

Install and configure
brew install awscli
aws --version
aws configure
aws configure --profile production
aws configure list --profile production
aws sts get-caller-identity --profile production

Use named profiles for production or customer accounts. Avoid long-lived credentials in shell history or shared notes.

S3 operations
aws s3 ls
aws s3 ls s3://example-bucket --recursive --human-readable --summarize
aws s3 cp ./dist s3://example-bucket/dist --recursive
aws s3 sync ./public s3://example-bucket --delete
aws s3api head-object --bucket example-bucket --key path/file.txt

Prefer sync --delete only when the bucket path is dedicated to that deployment target.

EC2 and IAM checks
aws ec2 describe-instances --query 'Reservations[].Instances[].{id:InstanceId,state:State.Name,type:InstanceType}'
aws ec2 describe-security-groups --group-ids sg-xxxxxxxx
aws iam get-user
aws iam list-attached-user-policies --user-name example-user

For audits, start from sts get-caller-identity so the account and role are explicit before changing anything.