perl批量更改密码

请大家多指正

#!/usr/bin/perl

use strict; 
use warnings;
use Net::SSH::Expect;  
use String::MkPasswd qw(mkpasswd);


my $user = "user";
my $pass = 123456;
my $root_pass = 123456;
my $new_user_pass = mkpasswd(-length => 15, -minnum => 3, -minlower => 3 , -minupper => 3, -minspecial => 3);
my $port = 22;



open (FILE, "
while () {
    print;
    &ssh_host( "$_", "$port", "$user", "$pass" );
}
close(FILE);


sub ssh_host() {
    my ( $host, $port, $user, $pass ) = @_;
    my $ssh = Net::SSH::Expect->new(
        host        => $host,
        port        => $port,
        password    => $pass,
        user        => $user,
        no_terminal => 0,
        raw_pty     => 1,
        timeout     => 5,
    );

    open (FH, ">> /var/bak/test/log_$host") or die "can't open file: $!\n";

    print FH "-" x 80, "\n";
    my $start_time = localtime;
    print FH "start \tat $start_time\n";

    $ssh->debug(0);
    $ssh->run_ssh() or die "SSH process couldn't start: $!\n";

    $ssh->waitfor( '\(yes\/no\)\?$', 5 );
    $ssh->send("yes\n");
    $ssh->waitfor( 'password:\s*$/', 5 );
    $ssh->send("$pass");

    $ssh->send("su - root");
    $ssh->waitfor( 'Password:\s*$', 5 );
    $ssh->send("$root_pass");
    $ssh->waitfor( '#\s*', 5 );

    print FH "root login ok. \n";

    $ssh->send("passwd");

    $ssh->waitfor( 'password:\s*$', 5 );
    $ssh->send("$new_user_pass");

    $ssh->waitfor( 'password:\s*$', 5 );
    $ssh->send("$new_user_pass");
    $ssh->waitfor( '#\s*', 5 );

    my $ls = $ssh->exec("id");
    print FH "$ls\n";
    print FH "chang password ok!!!!!!!\n";
    print FH "$new_user_pass\n";

    my $end_time = localtime;
    print FH "end \tat $end_time\n";

    $ssh->close();

    close FH;

    print "-" x 80, "\n";
}