Script to stop, start, and check AWS EC2 state

aws-on-off.sh

#!/bin/bash
instancename=$1
cmd=$2

# get instances id
instanceid=$(aws \
ec2 \
describe-instances \
--filters 'Name=tag:Name,Values=*'${instancename}'*' \
--query 'Reservations[*].Instances[*].InstanceId' \
--output text | tr '\n' ' ') 

# on or off instances
case $2 in
  on)
    echo "On $instanceid"
    aws ec2 start-instances --instance-ids $instanceid \
    --query 'StartingInstances[*].[InstanceId, CurrentState.Name]' --output text
  ;;

  off)
    echo "Off $instanceid"
    aws ec2 stop-instances --instance-ids $instanceid \
    --query 'StartingInstances[*].[InstanceId, CurrentState.Name]' --output text
  ;;

  check)
    echo "Check $instanceid"
    aws ec2 describe-instances --filters 'Name=tag:Name,Values='${instancename}' *' \
    --query 'Reservations[*].Instances[*].[InstanceId, State.Name]' --output text 
  ;;

  *)
    echo "aws-on-off [instance name] [on/off/check]"
  ;;

esac