Looks good.

I can add a few suggestions. You can reduce the number of lines to search by refining the ps call. It appears that you are checking daemon status, so `ps x` to show only processes with no controlling tty will cut the search space a lot.

You could improve the process check loop like this:

    @regexen = @process;
    for (@regexen) {
        quotemeta;
        $_ = qr/$_/;
    }
    for ( my $i = 0; $i <= $#alert; $i++ ) {
        unless(grep /$regexen[$i]/ , @ptable) {
            $alerts{"$alert[$i]"} .= "\n$message[$i]";
        }
    }
[download]

The quotemeta in the regex will save some hard to diagnose errors. and precompiling will likely save time since they are used to scan all the process entries.

A third improvement would be to reformulate your search to stop scanning when a regex matches, and to not check that regex again afterwards. See merlyn's reply to Ovid's (OT) Interview questions -- your response?, question 1.

After Compline,
Zaxo