Jeremy Bopp wrote in post #950260:
> On 10/14/2010 5:22 AM, Amit Tomar wrote:
>>    localhost.cmd("cd /home/dvsdkrp/workdir/smruti") { |c| print c }
>> What should i do??
> I want to think that the problem here is that the su program expects to
> have a terminal so that it can disable echoing what you type for your
> password and then directly read that password.  Driving a telnet session
> like this does not emulate a terminal and could cause problems for su.
> I would expect su to error out rather than cause a timeout though.
>
> Are you able to configure sudo on that host?  If so you can configure it
> to allow your account to run the desired command(s) without a password
> and then invoke sudo instead of su.
>
> -Jeremy

Hi Jeremy
          You are right this is how i solved it

su_prompt = "Password: "
localhost.cmd("String" => "su", "Match" => /#{su_prompt}/) { |c| print 
}
localhost.cmd("passwd")
Now its working fine

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