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bashparallel-processing

How do you run multiple programs in parallel from a bash script?

I am trying to write a .sh file that runs many programs simultaneously

I tried this

prog1 
prog2

But that runs prog1 then waits until prog1 ends and then starts prog2...

So how can I run them in parallel?

Solution

  • To run multiple programs in parallel:

    prog1 &
prog2 &

    If you need your script to wait for the programs to finish, you can add:

    wait

    at the point where you want the script to wait for them. For example:

    prog1 &
prog2 &
# (do other things while 'prog1' and 'prog2' carry on
# in the background)
...
# (Now we need the results of 'prog1' and 'prog2'
# before continuing, so let's wait for them to
# finish)
wait