Take commands(password) from string and set as InputStream to Unix servers in Java (JSCH)

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Java

Linux

shell

Hello Members,

I am using a JSCH api to execute commands in remote linux machines, since I have 200+ machines where I have to manually go to putty and change the password.

Now the problem with JSCH is that I cannot user "exec" to execute "passwd" command since linux takes only --stdin and I am not logging in as super user.

So using an other way around I would open a "shell" (from jsch api) in background and give input to shell via a String through InputStream

I made a code like below:

String s = "cd bin\n";

byte bb[] = s.getBytes();

InputStream intt = new ByteArrayInputStream(bb);

channel.setInputStream(new FilterInputStream(intt) {
    public int read(byte[] b, int off, int len) throws IOException {
        return in.read(b, off, (len > 1024 ? 1024 : len));
    }
});

Now this works perfectly when I want to execute only one command but I want to give multiple commands, for which I am facing issue.

Any suggestions?

regards,
Ishan