Can I add a command in bash that starts when I open it?

[Mike Hoy]

Just out of curiosity can I have a command execute when I open command line?

Thought I would have:

cat /proc/acpi/thermal_zone/THRM/temperature

start up each time I opened it so I could check my temperature regularly.

I searched for the answer and the closest answer I got was putting it
in /etc/rc.local, but that didn't work.

Thanks,

Mike Hoy