To get the IP addresses of all instances with the “Application” tag and its value “Frontend“, and also filter by state to display information about only those instances that are in the “running” state:
aws ec2 describe-instances --filter "Name=tag:Application,Values=Frontent" "Name=instance-state-name,Values=running" --query "Reservations[*].Instances[*][NetworkInterfaces[0].PrivateIpAddresses[0].PrivateIpAddress]" --output text
To display the name of instance along with the IP address:
aws ec2 describe-instances --filter "Name=tag:Application,Values=Frontend" "Name=instance-state-name,Values=running" --query "Reservations[*].Instances[*][Tags[?Key=='Name'].Value[],NetworkInterfaces[0].PrivateIpAddresses[0].PrivateIpAddress]" --output text