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Problem with running a shell script from the JSP  RSS feed

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Hi everyone,
I am having a problem when I am trying to execute the shell script from my JSP file.
my code:
Runtime r = Runtime.getRuntime();
Process p = null;
String cmd[] = {"/bin/sh", "-c" , "/root/"};
InputStreamReader isr = new InputStreamReader(p.getInputStream());
BufferedReader br = new BufferedReader(isr);
String line = null;
while ((line=br.readLine())!=null)
{ out.println(line); }
there is no error shown its calmly navigating to next page without executing the "" file. The case is something like once the user logs in the site a server should automatically start. Please let me know what is wrong with the code i mentioned above and also if you have anyother ways to go on with this.
thank you,
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