How do i connect to the Linux command prompt using JAVA code?

Q. Hmm... not sure if u understand wat i mean....
What i want to know is the codes in JAVA to run the things in Linux command prompt... Like when i run the java prog, i want to be able to connect to the command prompt ... (hope u understand... :P)
Thanks a lot... =)

PS: Any useful links will be really appreciated =)

A. I think I know what your trying to say. You want to run a linux command from the the Java Runtime Environment. This command should work.
Runtime.getRuntime().exec(String command);
There is more info at this link http://saloon.javaranch.com/cgi-bin/ubb/ultimatebb.cgi?ubb=get_topic&f=34&t=003535.

Original Question

What is the linux command to obtain the PID number of a specific program running?

Q. I'm tired to use the "top" and search around for the PID of a program that I know is running on a remote terminal, left open by someone else, and that I want to kill. I wonder if there is a linux command that would return the PID of only that program.

A. ps aux | grep processname
or
pidof processname

Original Question

How to enter password by linux command?

Q. As the title.I would like to find out How to enter password by linux command?

eg: when you write a script to sudo root. then you will be asked to enter password.
how can i do it by linux script? Is there a command can do the job?
Thanks in advance.

A. Don't. just run sudo script instead of trying to put sudo into the script.

Original Question

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