Show regions available for ec2
# show regions available
aws ec2 describe-regions --output text --query 'Regions[*].RegionName'
output:
ap-south-1 eu-west-1 ap-southeast-1 ap-southeast-2 eu-central-1 ap-northeast-2 ap-northeast-1 us-east-1 sa-east-1 us-west-1 us-west-2