Cloud instances bill by the hour (or the minute) – and right now you're burning money. Use
snooze to auto-shutdown your instances in 45 minutes.
snooze to your
alias snooze='sudo shutdown -c ; sudo shutdown -h +45 &' snooze
When you want to extend your session, run
Broadcast message from ec2-user@ip-172-31-43-250 (/dev/pts/1) at 2:50 ... The system is going down for halt in 45 minutes!
shutdown -c cancels the shutdown, and
shutdown -h +45 schedules a shutdown in 45min.
Stay tuned !