my $ha1 = "hostname62a";
my $ha2 = "hostname62b";

my $cmd1 = "egrep -i \"\\b$ha1\\b|\\b$ha2\\b\" /etc/hosts";

open(HOSTS1, "$cmd1|");
while(<HOSTS1>) {
    chomp;
    push (@hosts_ha1, $_);
}
close(HOSTS1);