Any time doing hand-rolled on demand spinning up of ec2 instances, be sure they are properly spun down later.

It's very easy to get hit with a massive bill due to just leaving instances around.

I run

sudo shutdown +15 (or other amount of minutes)

when I need a compute instance and don’t want to forget to turn it off. It’s a simple trick that will save you in some cases.

	▲	apawloski 4 hours ago \| parent \| next [-]
		For expensive GPU instances I have a crontab one-liner that shuts the node down after 2 hours if I don't touch an override file (/var/run/keepalive). /5 * * * [ -f /var/run/keepalive ] && [ $(( $(date +\%s) - $(stat -c \%Y /var/run/keepalive) )) -gt 7200 ] && shutdown -h now
	▲	tln 5 hours ago \| parent \| prev [-]
		Sort of like cancelling Disney right after signing up for the free trial.. nice!