Hi All,

I have been struggling for a week trying to run a unix command from my java program.

the unix command is:

ssh dmdev3@tsapid01-zt3d01 ':> /t3/envs/dmdev3/test/file_list.txt'

ksh: :> /t3/envs/dmdev3/test/file_list.txt:  not found

procTemp=runEnv.exec(strShellCmd);

Please don't cross post the same question across multiple forums, it dilutes effort.

i am sorry. was a bit confused on the correct location of the topic.
rest assured it wont happen again.

Let's see that line too.
First impression is that the command would be better placed in Shell Script.

What (in words) are you expecting the command to do. It appears to just execute a null command on a remote server.

The /t3/envs/dmdev3/test/file_list.txt file is (should be) cleared by this command.

private boolean executeShell(String strShellCmd) {
        try {
            procTemp=runEnv.exec(strShellCmd);

            //read the output from shell console
            BufferedReader brShellOP = new BufferedReader(
                    new InputStreamReader(procTemp.getInputStream()));
            String strShellOP = null;
            while ((strShellOP = brShellOP.readLine()) != null) {
                System.out.println(strShellOP);
            }
            brShellOP.close();

            // catch error from shell console (if any)
            BufferedReader brShellError = new BufferedReader(
                    new InputStreamReader(procTemp.getErrorStream()));
            String strShellError = null;
            while ((strShellError = brShellError.readLine()) != null) {
                System.out.println(strShellError);
            }
            brShellError.close();

            // wait for the process to finish
            try {
                intExitVal = procTemp.waitFor();
            } catch (InterruptedException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            
            
            //returns false if shell console throws error
            if(intExitVal!=0){
                return false;
            }
            return true;

        } catch (IOException ioEx) {
            System.out.println("error in executeShell().IOException");
            ioEx.printStackTrace();
            return false;
        }
    }

Use cp /dev/null /t3/envs/dmdev3/test/file_list.txt