尝试执行命令时抛出的错误

Question

我在尝试使用java中的Ganymed库进行连接测试时有点问题，2周前它工作正常，没有问题，但现在我收到以下错误消息：

The execute request failed. 

这与Ganymed的“execCommand（）”方法有关。当我使用WinSCP进行连接时，一切正常，但尝试使用java连接会给我带来错误。我也在想，如果防火墙也可能是原因，只是一个想法。

我使用以执行tail命令的代码如下：

 import java.io.BufferedReader; 
     import java.io.IOException; 
     import java.io.InputStream; 
     import java.io.InputStreamReader; 
     import java.util.HashMap; 
     import java.util.Map; 
     import ch.ethz.ssh2.Connection; 
     import ch.ethz.ssh2.Session; 
     import ch.ethz.ssh2.StreamGobbler; 


    public class SSHTesting { 


public static void main(String[] args) { 


    try{ Connection conn = new Connection("eappdev101.momentum.co.za"); 

    conn.connect(); 

     boolean isAuthenticated = conn.authenticateWithPassword("username", "password"); 

     if (isAuthenticated == false) { 
      System.out.println("Credentials are wrong."); 
     } 

     Session sess = conn.openSession(); 

     sess.execCommand("tail -f /logs/SystemOut.log"); 
     InputStream stdout = new StreamGobbler(sess.getStdout()); 
     BufferedReader br = new BufferedReader(new InputStreamReader(stdout)); 

     sess.close(); 
     conn.close(); 
     System.out.println("Done"); 
} 

catch(Exception ie){ 
    System.out.println(ie.getMessage()); 
} 



} 

    } 

光的任何棚屋在高度赞赏。先谢谢你。

Answer 1

对我来说，正常工作与关键，我认为你应该使用键出于安全原因

检查下面的代码

private void init() throws IOException{ 
     char privateKeyChar[] = sshPrivateKey.toCharArray(); 

     conn = new Connection(ftpHostname,22); 
     conn.connect(); 

     boolean isAuthenticated = conn.authenticateWithPublicKey(sshUsername, privateKeyChar, null); 
     if (isAuthenticated == false) 
      throw new IOException("Authentication failed."); 

     session = conn.openSession();  
    } 

    public String excuteCMD(String cmd) throws IOException 
    { 
     session = conn.openSession(); 
     session.execCommand(cmd); 
     InputStream stdout = new StreamGobbler(session.getStdout()); 
     BufferedReader br = new BufferedReader(new InputStreamReader(stdout)); 

     while (true) 
     { 

      String line = br.readLine(); 
      if (line == null) 
       break; 
      else 
       output+=line; 
     } 

     return output; 
    }