I can not get this to return anything but `null` for ip. I must be missing something in the way that I format the operations inside the String array, please help! Also, is there a better sdk for command line work in Java? **Update** For future reference, this is an EC2 Instance, and doing an InetAddress.getLocalHost() returns null, so I've reverted to the command line (the AWS SDK is kind of a pain just to drill down for a localhost IP).

// Command to be run: `/sbin/ifconfig | awk 'NR==2{print$2}' | sed 's/addr://g'`

```
String[] command = new String[] {"/sbin/ifconfig", "awk 'NR==2{print$2}'", "sed 's/addr://g'" };
String ip = runCommand(command);

public static String runCommand(String[] command) {
        String ls_str;
        Process ls_proc = null;
        try {
            ls_proc = Runtime.getRuntime().exec(command);
        } catch (IOException e1) {
            e1.printStackTrace();
        }
        DataInputStream ls_in = new DataInputStream(ls_proc.getInputStream());

        try {
            while ((ls_str = ls_in.readLine()) != null) {
                    return ls_str;
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }

```