CODEWITHSUNDEEP
javaunixjschpasswd
Vaibhav Arora
Vaibhav Arora

Reputation: 91

change password remote unix server using java

I am looking for a way to fire passwd onto a remote unix server via a java code. I am using Jsch, I can successfully execute commands like find, zip, get. But when I pass 'passwd' command nothing happens. The motive is to create an application which can change the password of unix server in every 10 days.

This is the code I am trying to use (find command works fine)

JSch sftp=new JSch();
        Session session=sftp.getSession("Test", "150.236.9.75");
        session.setConfig("StrictHostKeyChecking", "no");
        session.setConfig("compression.s2c", "[email protected],zlib,none");
        session.setConfig("compression.c2s", "[email protected],zlib,none");
        session.setConfig("compression_level", "9");
        session.setPassword("Test@123");
        session.connect();

        if(session.isConnected())
        {
            String line="";
            System.out.println("connected");
            ChannelExec ch=(ChannelExec) session.openChannel("exec");
            String Command="passwd -s; Test@123; Pass@123; Pass@123";
            //String Command="find *";
            InputStream in = ch.getInputStream();
            ch.setCommand(Command);
            ch.connect();
            byte[] buffer = new byte[1024]; 
            int bytes;
            do {
                while (in.available() > 0) {
                    bytes = in.read(buffer, 0, 1024);
                    String file=new String(buffer, 0, bytes);
                    System.out.println(file);
                    line=line+file;
                }
            } while (!ch.isClosed());   
            ch.disconnect();
        }
        session.disconnect();

Upvotes: 0

Views: 1083

Answers (2)

Julián Martinez
Julián Martinez

Reputation: 1

For me running the next command without using Thread.sleep works:

echo -e \"new-password\nnew-password\" | passwd user-linux

Upvotes: 0

Alex
Alex

Reputation: 2485

The passwd command requires interative input (i.e. read from stdin), see How to write in Java to stdin of ssh?

Upvotes: 2

Related Questions