Simulating user inputs

Problem

Some programs require user to enter certain command before proceeding, we want to be able to send input to those programs automatically.

Solution

The expect program can be used for this purpose. It will detect certain text that the program output such as a question, or a prompt, then it sends the the texts that we've prepares to the program.

For instance, send ssh password automatically

    expect -c "ssh abc@10.0.0.10\n ;  expect password: ; send mypassword\n ; interact "