AWS CLI

Manage AWS resources using the AWS CLI v2.

Environment Variables

• AWS_ACCESS_KEY_ID - AWS access key
• AWS_SECRET_ACCESS_KEY - AWS secret key
• AWS_DEFAULT_REGION - Default region (e.g. us-east-1)
• AWS_SESSION_TOKEN - Session token (for temporary credentials)

Identity

aws sts get-caller-identity

EC2 Instances

aws ec2 describe-instances --query 'Reservations[].Instances[].{Id:InstanceId,Type:InstanceType,State:State.Name,Name:Tags[?Key==`Name`].Value|[0]}' --output table

aws ec2 start-instances --instance-ids i-1234567890abcdef0

aws ec2 stop-instances --instance-ids i-1234567890abcdef0

Lambda

aws lambda list-functions --query 'Functions[].{Name:FunctionName,Runtime:Runtime,Memory:MemorySize}' --output table

aws lambda invoke --function-name my-function --payload '{"key":"value"}' /tmp/lambda-output.json && cat /tmp/lambda-output.json

ECS

aws ecs list-clusters --output table

aws ecs list-services --cluster my-cluster --output table

aws ecs describe-services --cluster my-cluster --services my-service --query 'services[].{Name:serviceName,Status:status,Running:runningCount,Desired:desiredCount}' --output table

CloudWatch Logs

aws logs describe-log-groups --query 'logGroups[].logGroupName' --output table | head -20

aws logs tail /aws/lambda/my-function --since 1h --format short

S3

aws s3 ls

aws s3 ls s3://my-bucket/ --recursive --human-readable --summarize | tail -20

IAM

aws iam list-users --query 'Users[].{Name:UserName,Created:CreateDate}' --output table

aws iam list-roles --query 'Roles[].{Name:RoleName,Arn:Arn}' --output table | head -20

CloudFormation

aws cloudformation list-stacks --stack-status-filter CREATE_COMPLETE UPDATE_COMPLETE --query 'StackSummaries[].{Name:StackName,Status:StackStatus}' --output table

RDS

aws rds describe-db-instances --query 'DBInstances[].{Id:DBInstanceIdentifier,Engine:Engine,Status:DBInstanceStatus,Class:DBInstanceClass}' --output table

Cost (last 7 days)

aws ce get-cost-and-usage \
  --time-period Start=$(date -d '7 days ago' +%Y-%m-%d),End=$(date +%Y-%m-%d) \
  --granularity DAILY \
  --metrics BlendedCost \
  --query 'ResultsByTime[].{Date:TimePeriod.Start,Cost:Total.BlendedCost.Amount}' --output table

Notes

• Use --output table for readable output, --output json for parsing with jq.
• Use --query (JMESPath) to filter results.
• Always confirm before modifying resources (start/stop instances, invoke functions, delete).
• Use --dry-run where supported to preview changes.