Regression script

Hello,

I need regression scripts for verification purposes, i.e. to run suit
of testcases. Preferably to launch as many testcases simultaneously as
per available licences at that time. That is, I don't want to run each
testcase serially one after the other, this will take too long.

It could be in Perl, tcl or c-shell (or for that matter in any other
language which can be run on Linux)

Thanks,
Jaspal

PS: If a suitable online resource is available, then please point it
to me. Thanks.