Hi All, I'm new to android app's. I need to execute following command in my app. command: echo "1" > /sys/manager0/enable I tried this with following code in my app. Process p = Runtime.getRuntime().exec("su"); DataOutputStream stdin = new DataOutputStream(p.getOutputStream()); String cmd = "echo \"1\" /sys/manager0/enable"; stdin.writeBytes(cmd+"\n"); There is no error and app executed perfectly but there is no change in the /sys/manager0/enable Please give suggest some solution to this. Thanks in advance.