Shutdown program after set time

[raleigh3]

Is there a way to shut down a program after a set amount of time?

For example: Start Seamonkey and have it close after one hour.

This does not work.

#!/bin/bash
# Ubuntu_Mate 18.04 LTS
#
#
seamonkey
sleep 1
killall seamonkey

[ajgreeny]

For a start, that script would kill it only 1 second after starting it, not one hour as you say you want.
From man sleep:

sleep NUMBER[SUFFIX]...

Pause for NUMBER seconds. SUFFIX may be 's' for seconds (the default), 'm' for minutes, 'h' for hours or 'd'
for days.

Have you tried

#!/bin/bash
seamonkey
sleep 1h; killall seamonkey

or just use a simple compound command

seamonkey & sleep 1h; killall seamonkey

[raleigh3]

Thanks. Both methods worked.