java - execute sequense of commands in sshj

Question

I need to execute some sequence of commands at the remote server via ssh, using sshj library.

I do

        Session session = ssh.startSession();
        Session.Command cmd = session.exec("ls -l");
        System.out.println(IOUtils.readFully(cmd.getInputStream()).toString());
        cmd.join(10, TimeUnit.SECONDS);
        Session.Command cmd2 = session.exec("ls -a");
        System.out.println(IOUtils.readFully(cmd2.getInputStream()).toString());

and it throws me

net.schmizz.sshj.common.SSHRuntimeException: This session channel is all used up

But I can't recreate session for every single command, because this example it will show home directory list, but not the /some/dir list.

Answer 1

As odd as it is, session can only be used once. So you have to reset the session every time.

    Session session = ssh.startSession();
    Session.Command cmd = session.exec("ls -l");
    System.out.println(IOUtils.readFully(cmd.getInputStream()).toString());
    cmd.join(10, TimeUnit.SECONDS);

    session = ssh.startSession();
    Session.Command cmd2 = session.exec("ls -a");
    System.out.println(IOUtils.readFully(cmd2.getInputStream()).toString());

Or if the shell you are connecting to supports delimited commands (and the situation allows it), you can do this (bash example):

session.exec("ls -l; <command 2>; <command 3>");