Executing a remote command

Hi,
I need to execute some commands on a remote machine. The local machine is a win2K box running weblogic. The remote machine is a UNIX box and it is not running RMI. I have tried using Runtime.getRuntime().exec(cmd) to do this. I tried making calls to telnet, rsh, and rexec for the cmd. In all three cases I was unable to get ahold of the input stream to be able to supply a password.
I have looked at using the de.mud.telnet package but was unable to use it because of a liscencing issue.
Is there another method I should be trying?
Can anyone help?

For details on Runtime.exec: http://www.javaworld.com/javaworld/jw-12-2000/jw-1229-traps.html
ORO's NetComponents can handle telnet: http://www.savarese.org/oro/software/NetComponents.html
There's also a "java telnet application" in sourceforge: http://sourceforge.net/projects/jta/

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