How do I run SSH commands on remote system using Java

Question

I am new to this kind of Java application and looking for some sample code on how to connect to a remote server using SSH   execute commands  and get output back using Java as programming language

User · Answer

You may take a look at this Java based framework for remote command execution  incl  via SSH  https   github com jkovacic remote-exec  It relies on two opensource SSH libraries  either JSch  for this implementation even an ECDSA authentication is supported  or Ganymed  one of these two libraries will be enough   At the first glance it might look a bit complex  you ll have to prepare plenty of SSH related classes  providing server and your user details  specifying encryption details  provide OpenSSH compatible private keys  etc   but the SSH itself is quite complex too   On the other hand  the modular design allows for simple inclusion of more SSH libraries  easy implementation of other command s output processing or even interactive classes etc

User · Answer

Below is the easiest way to SSh in java  Download any of the file in the below link and extract  then add the jar file from the extracted file and add to your build path of the project  http   www ganymed ethz ch ssh2  and use the below method  public void SSHClient String serverIp String command  String usernameString String password  throws IOException          System out println  inside the ssh function            try                       Connection conn   new Connection serverIp               conn connect                boolean isAuthenticated   conn authenticateWithPassword usernameString  password               if  isAuthenticated    false                  throw new IOException  Authentication failed                         ch ethz ssh2 Session sess   conn openSession                sess execCommand command                 InputStream stdout   new StreamGobbler sess getStdout                 BufferedReader br   new BufferedReader new InputStreamReader stdout                System out println  the output of the command is                while  true                                String line   br readLine                    if  line    null                      break                  System out println line                             System out println  ExitCode      sess getExitStatus                 sess close                conn close                      catch  IOException e                        e printStackTrace System err

User · Answer

I created solution based on JSch library  import com google common io CharStreams import com jcraft jsch ChannelExec import com jcraft jsch JSch import com jcraft jsch JSchException import com jcraft jsch Session  import static java util Arrays asList  class RunCommandViaSsh        private static final String SSH HOST    quot test domain com quot      private static final String SSH LOGIN    quot username quot      private static final String SSH PASSWORD    quot password quot       public static void main             System out println runCommand  quot pwd quot            System out println runCommand  quot ls -la quot                private static List lt String gt  runCommand String command            Session session   setupSshSession            session connect             ChannelExec channel    ChannelExec  session openChannel  quot exec quot            try               channel setCommand command               channel setInputStream null               InputStream output   channel getInputStream                channel connect                 String result   CharStreams toString new InputStreamReader output                return asList result split  quot  n quot                catch  JSchException   IOException e                closeConnection channel  session              throw new RuntimeException e             finally               closeConnection channel  session                       private static Session setupSshSession             Session session   new JSch   getSession SSH LOGIN  SSH HOST  22           session setPassword SSH PASSWORD           session setConfig  quot PreferredAuthentications quot    quot publickey keyboard-interactive password quot            session setConfig  quot StrictHostKeyChecking quot    quot no quot       disable check for RSA key         return session             private static void closeConnection ChannelExec channel  Session session            try               channel disconnect             catch  Exception ignored                      session disconnect

User · Answer

JSch is a pure Java implementation of SSH2 that helps you run commands on remote machines  You can find it here  and there are some examples here   You can use exec java

User · Answer

I used ganymede for this a few yeas ago    http   www cleondris ch opensource ssh2

User · Answer

Have a look at Runtime exec   Javadoc  Process p   Runtime getRuntime   exec  ssh myhost    PrintStream out   new PrintStream p getOutputStream     BufferedReader in   new BufferedReader new InputStreamReader p getInputStream       out println  ls -l  home me    while  in ready        String s   in readLine      System out println s     out println  exit     p waitFor

[java] How do I run SSH commands on remote system using Java?

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