How do you run multiple programs from a bash script?

Question

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?

Thanks

Answer 1

prog1 &
prog2 &

Answer 2

#!/bin/bash
prog1 & 2> .errorprog1.log; prog2 & 2> .errorprog2.log

Redirect errors in separate log's

Answer 3

There is a very useful program that calls nohup.

     nohup - run a command immune to hangups, with output to a non-tty

Answer 4

You can try ppss. ppss is rather powerful - you can even create a mini-cluster. xargs -P can also be useful if you've got a batch of embarrassingly parallel processing to do.

Answer 5

With GNU Parallel http://www.gnu.org/software/parallel/ it is as easy as:

(echo prog1; echo prog2) | parallel