Windows Batch File – How to SSH to a Remote Server Using PuTTY

Because the commands that are contained in the command.txt are executed by a master shell one-by-one.

So the master shell executes the sudo, waits for it to exit, before it proceeds with the other commands (ls and cd). And the sudo does not exit (at least not on its own).

While you want the ls and cd to execute within a child shell executed by the su.

You have to tell the su to execute the commands.

This should work:

sudo su - -c "ls ; cd directory" user1

or this

echo "ls; cd directory" | sudo su - user1

Though I expect that you actually want to continue working in the shell. While the above will exit once the commands are executed.

So you want to add a shell to the list of commands:

sudo su - -c "ls ; cd directory ; /bin/bash" user1

or

echo "ls ; cd directory ; /bin/bash" | sudo su - user1