[gentoo-user] Any way to run multiple commands from single script in parallel?

[J. Roeleveld]

Hi,

I often put multiple commands into a single file/script to be run in sequence. 
(each line can be executed individually, there is no dependency)

Is there a tool/method to execute multiple lines/commands simultaneously? Like 
having 3 or 4 run together and when 1 is finished, it will grab the next one in 
the list?

I would prefer this over simply splitting the file as the different lines/
commands will not take the same amount of time.

Thanks,

Joost