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#!/usr/bin/perl -w print STDERR "$$\n"; `./my_program`;
(ulimit -u150; ./my_program)
Debian GNU/Linux, 2.6.18-iplus #1 SMP Wed Dec 12 14:35:52 CET 2007 i68 +6 GNU/Linux perl, v5.8.8 built for i486-linux-gnu-thread-multi