Expect getting started--Automating Linux interactive commands

Many Linux programs, such as PASSWD,FTP,SCP,SSH, do not provide a silent execution option, but rely on the terminal input at runtime to perform the next steps such as changing passwords, uploading files, downloading, and so on. Although some programming languages such as Java embed a lot of these common tools API such as JCSH, but after all, they are not natural and handy.

Expect is a command-line tool under Unix/linux, which is developed using TCL as a programming language. Its main function is to simulate the end-user control of interactive applications.

Expect getting started--Automating Linux interactive commands