Calling remote Shell Script using Java

Using following code snippet, we can execute shell script hosted in remote Unix machine. To compile following program, we need to add Jsch JAR file available from http://www.jcraft.com/jsch/.

Code snippet:

package client;

import com.jcraft.jsch.Channel;

import com.jcraft.jsch.ChannelExec;

import com.jcraft.jsch.JSch;

import com.jcraft.jsch.Session;

public class execJSch {

    public execJSch() {

        super();

    }

    /**

     * Comments by lkakarla

     * Following code snippet calls shell script resides in remote Unix machine. 

     * Note: For reusability, set host pwd command variables as parameters

     * @param args

     */

    public static void main(String[] args) {

        try {

            JSch jsch = new JSch();

            

            String host = "user@host";

            String pwd  = "password";

            String command = "/usr/bin/lkakarla/TestSH.sh";

            

            String user = host.substring(0, host.indexOf('@'));

            host = host.substring(host.indexOf('@') + 1);

            Session sessionJSH = jsch.getSession(user, host, 22);

            sessionJSH.setPassword(pwd);

            java.util.Hashtable configJSH = new java.util.Hashtable();

            configJSH.put("StrictHostKeyChecking", "no");

            sessionJSH.setConfig(configJSH);

            sessionJSH.connect();

            Channel channel = sessionJSH.openChannel("exec");

            ((ChannelExec)channel).setCommand(command);

            channel.connect();

            channel.disconnect();

            sessionJSH.disconnect();

        }

        catch (Exception e) {

            System.out.println(e);

        }

    }

}