I am trying to use Expect to log into a series of machines to run uptime on them. I get to the password prompt and then when I send my password it just hangs and doesn't execute the command. I have tried sending the password string by itself, ending in a \n, a \r, and a \r\n to no avail. Below is the code:

$ssh_cmd = Expect->spawn("ssh $host uptime");

unless ($ssh_cmd->expect(3, "password:")) {
  print "ssh error";

print $ssh_cmd "password";
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Thanks in advance for any insights.