how to run a command at terminal from java program?

You need to run it using bash executable like this:

Runtime.getRuntime().exec("/bin/bash -c your_command"); 

Update: As suggested by xav, it is advisable to use ProcessBuilder instead:

String[] args = new String[] {"/bin/bash", "-c", "your_command", "with", "args"}; Process proc = new ProcessBuilder(args).start(); 

I vote for Karthik T's answer. you don't need to open a terminal to run commands.

For example,

// file: RunShellCommandFromJava.java import java.io.BufferedReader; import java.io.InputStreamReader; public class RunShellCommandFromJava { public static void main(String[] args) { String command = "ping -c 3 www.google.com"; Process proc = Runtime.getRuntime().exec(command); // Read the output BufferedReader reader = new BufferedReader(new InputStreamReader(proc.getInputStream())); String line = ""; while((line = reader.readLine()) != null) { System.out.print(line + "\n"); } proc.waitFor(); } } 

The output:

$ javac RunShellCommandFromJava.java $ java RunShellCommandFromJava PING http://google.com (123.125.81.12): 56 data bytes 64 bytes from 123.125.81.12: icmp_seq=0 ttl=59 time=108.771 ms 64 bytes from 123.125.81.12: icmp_seq=1 ttl=59 time=119.601 ms 64 bytes from 123.125.81.12: icmp_seq=2 ttl=59 time=11.004 ms --- http://google.com ping statistics --- 3 packets transmitted, 3 packets received, 0.0% packet loss round-trip min/avg/max/stddev = 11.004/79.792/119.601/48.841 ms 

You don't actually need to run a command from an xterm session, you can run it directly:

String[] arguments = new String[] {"/path/to/executable", "arg0", "arg1", "etc"}; Process proc = new ProcessBuilder(arguments).start(); 

If the process responds interactively to the input stream, and you want to inject values, then do what you did before:

OutputStream out = proc.getOutputStream(); out.write("command\n"); out.flush(); 

Don't forget the '\n' at the end though as most apps will use it to identify the end of a single command's input.

As others said, you may run your external program without xterm. However, if you want to run it in a terminal window, e.g. to let the user interact with it, xterm allows you to specify the program to run as parameter.

xterm -e any command 

In Java code this becomes:

String[] command = { "xterm", "-e", "my", "command", "with", "parameters" }; Runtime.getRuntime().exec(command); 

Or, using ProcessBuilder:

String[] command = { "xterm", "-e", "my", "command", "with", "parameters" }; Process proc = new ProcessBuilder(command).start(); 

I don't know why, but for some reason, the "/bin/bash" version didn't work for me. Instead, the simpler version worked, following the example given here at Oracle Docs.

String[] args = new String[] {"ping", "www.google.com"}; Process proc = new ProcessBuilder(args).start(); 

I know this question is quite old, but here's a library that encapsulates the ProcessBuilder api.