Perl One Liner to Find Duplicate RPM's in Linux

rpm --last -qa | perl -n -e '/^(\S+)-\S+-\S+/; print "$&\n" if $SEEN{$1}; $SEEN{$1} ||= $_;' | uniq > duplicates.txt

Perl Script to Restart PVM hosts

#!/usr/bin/perl
### This script restarts PVM's that have failed ###
use Parallel::Pvm;
use Net::Ping;
### Set PVM Hostfile location ###
$user="schmaus";
$pvmhostfile="/home/$user/.pvmhostfile";

### Nothing to change below this line ###
open (PVMHOST, $pvmhostfile);
while ($hostname = ) {
chomp($hostname);
$status = Parallel::Pvm::mstat("$hostname");
chomp($status);
if ($status ne "0") {
$alive="1";
$p = Net::Ping->new();
$alive="0" if $p->ping($hostname);
$p->close();
if ($alive ne "0") {
print "$hostname: Offline-Down\n";
} else {
Parallel::Pvm::addhosts("$hostname");
print "$hostname: Offline-Restarted\n";
}
} else {
print "$hostname: Online\n";
}
}
close(PVMHOST);
exit;