How can I execute parallel "for" loops in Bash?

Question

I have been trying to parallelize the following script, specifically the for loop. How can I do that?

#!/bin/bash
for i in `cat /root/vms`;
do
    /usr/bin/sshpass -p 'test' /usr/bin/ssh -o StrictHostKeyChecking=no \
        -l testuser $i -t 'echo test | sudo -S yum update -y'
done

Answer 1

Replace

/usr/bin/sshpass ...

with

/usr/bin/sshpass ... &