I just call passwdgen to generate my passwords. It may not be as portable but it does offer a ton of flexibility. 
sub generatePassword {
    my $password = `passwdgen -pa --length=6`;
    $password =~ s/Your password is: (.*)/$1/;
    chomp $password;
    return $password;
}

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In reply to Re^2: need to auto generate user/password info by Seumas
in thread need to auto generate user/password info by perl-less

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