I understand that there is duplicate >>> copied from the duplicate >>>As long as your local machine has an SSH server running <<<<< but i cannot comment and cannot as from the question (and im not providing an answer....)
It stated that "As long as your local machine has an SSH server running" but I do not know how to have a SSh server running. I turn on my putty (double click on it) (not sure if this means the SSH(?Putty?) server (?) is running... doubt so...
im really new to socket programming. i am making use of JSch (http://www.jcraft.com/jsch/) to try to connect to a remote server (later stage) currently, this is the code i use and im trying to connect to my local computer and execute a command (ls to be exact) to do a test. However, i keep hitting the connection refused. I googled and i noticed that there are some articles that mentions on "having a server listening" but I have no idea what it means. Please view my code as below.
import java.awt.event.*;
import javax.swing.*;
import java.awt.*;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Properties;
import com.jcraft.jsch.*;
class SwingWorkerExample {
JTextField hostField;
JTextField userNameField;
JTextField passwordField;
JPanel panel;
public SwingWorkerExample() {
JPanel p = panel = new JPanel(new GridLayout(0,2));
hostField = new JTextField(20);
userNameField = new JTextField(20);
passwordField = new JPasswordField(20);
JButton testButton = new JButton("connect!");
testButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ev) {
testConnectionButtonActionPerformed(ev);
}
});
p.add(new JLabel("host:"));
//127.0.0.1
p.add(hostField);
p.add(new JLabel("user:"));
//mycomputerusername
p.add(userNameField);
p.add(new JLabel("password:"));
//mycomputerpassword
p.add(passwordField);
p.add(testButton);
}
public JPanel getPanel() {
return panel;
}
private void testConnectionButtonActionPerformed(ActionEvent evt) {
SwingWorker sw = new SwingWorker(){
protected Object doInBackground() throws Exception {
try {
JSch jsch = new JSch();
String host = hostField.getText();
String username = userNameField.getText();
String password = passwordField.getText();
Session session = jsch.getSession(username, host);
session.setPassword(password);
session.setConfig("StrictHostKeyChecking", "no");
session.setTimeout(20000);
System.out.println("Connecting to server...");
session.connect();
return session;
}
catch(Exception ex) {
ex.printStackTrace();
throw ex;
}
}
public void done(){
try {
System.out.println(get());
} catch (Exception ex) {
ex.printStackTrace();
}
}
};
sw.execute();
}
public static void main(String[] egal) {
EventQueue.invokeLater(new Runnable(){public void run() {
SwingWorkerExample ex = new SwingWorkerExample();
JFrame f = new JFrame("bla");
f.setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
f.setContentPane(ex.getPanel());
f.pack();
f.setVisible(true);
}});
}
public void remoteLs() throws JSchException, IOException {
JSch js = new JSch();
Session s = js.getSession("kellyseo", "192.168.0.103", 22);
s.setPassword("S9031808z");
Properties config = new Properties();
config.put("StrictHostKeyChecking", "no");
s.setConfig(config);
s.connect();
Channel c = s.openChannel("exec");
ChannelExec ce = (ChannelExec) c;
ce.setCommand("ls -l");
ce.setErrStream(System.err);
ce.connect();
BufferedReader reader = new BufferedReader(new InputStreamReader(ce.getInputStream()));
String line;
while ((line = reader.readLine()) != null) {
System.out.println(line);
}
ce.disconnect();
s.disconnect();
System.out.println("Exit code: " + ce.getExitStatus());
}
public void remoteMkdir() throws JSchException, IOException {
JSch js = new JSch();
Session s = js.getSession("myusername", "myremotemachine.mycompany.com", 22);
s.setPassword("mypassword");
Properties config = new Properties();
config.put("StrictHostKeyChecking", "no");
s.setConfig(config);
s.connect();
Channel c = s.openChannel("exec");
ChannelExec ce = (ChannelExec) c;
ce.setCommand("mkdir remotetestdir");
ce.setErrStream(System.err);
ce.connect();
BufferedReader reader = new BufferedReader(new InputStreamReader(ce.getInputStream()));
String line;
while ((line = reader.readLine()) != null) {
System.out.println(line);
}
ce.disconnect();
s.disconnect();
System.out.println("Exit code: " + ce.getExitStatus());
}
public void remoteCopy() throws JSchException, IOException, SftpException {
JSch js = new JSch();
Session s = js.getSession("myusername", "myremotemachine.mycompany.com", 22);
s.setPassword("mypassword");
Properties config = new Properties();
config.put("StrictHostKeyChecking", "no");
s.setConfig(config);
s.connect();
Channel c = s.openChannel("sftp");
ChannelSftp ce = (ChannelSftp) c;
ce.connect();
ce.put("/home/myuser/test.txt","test.txt");
ce.disconnect();
s.disconnect();
}
}
BTW i uses commandprompt to ping 127.0.0.1 is okay but if i use telnet 127.0.0.1 it says Could not open connection to the host (I turned on putty(?double click?) , on port 23: Connect failed. and, SSH = PUTTY ... right? (i cannot use the 'ssh' command in command prompt)
Links: 1) http://sourceforge.net/p/jsch/mailman/message/31745775/
and 2) http://javarevisited.blogspot.sg/2013/02/java-net-ConnectException-Connection-refused.html
and 3) http://www.jcraft.com/jsch/examples/ and 4) Run a command over SSH with JSch and 5) Can we use JSch for SSH key-based communication?
and... thanks is advance!!
oh, and theres also http://www.ganymed.ethz.ch/ssh2/ (an alternative to JSch.. any advise welcomed!) but when i try to run the example, it says no main. which.. i duno >.< Will stick w JSch till then....
BTW, i try https://serverfault.com/questions/185153/free-public-ssh-server-for-testing-purposes for server but... i have no idea whats the address, username and password. (i also have a http://sdf.org account newly created but when i try to connect to it, it says unknownhost. fyi!)
forgot to mention, im using windows 7 and 'yum' is not a command in my command prompt...
