What is spawn in expect script?

What is spawn in expect script?

The spawn command is used to start a script or a program like the shell, FTP, Telnet, SSH, SCP, and so on. The remaining lines are the Expect script that interacts with our shell script. The last line if the end of file which means the end of the interaction.

What is expect scripting language?

Expect is an extension to the Tcl scripting language written by Don Libes. The program automates interactions with programs that expose a text terminal interface. Expect, originally written in 1990 for the Unix platform, has since become available for Microsoft Windows and other systems.

How do I run a shell script in expect?

Expect Command

1. The spawn command starts a script or a program like the shell, FTP, Telnet, SSH, SCP, and so on.
2. The send command sends a reply to a script or a program.
3. The Expect command waits for input.
4. The interact command allows you to define a predefined user interaction.

What is bash expect?

Expect command or expect scripting language is a language that talks with your interactive programs or scripts that require user interaction. Expect scripting language works by expecting input, then the Expect script will send the response without any user interaction.

What is expect in bash?

How can I build an Expect script automatically?

To build an expect script automatically, you can the use autoexpect command.autoexpect works like expect, but it builds the automation script for you. The script you want to automate is passed to autoexpect as a parameter and you answer the questions and your answers are saved in a file.

How does the autoexpect command work in Java?

The autoexpect command works like the expect command, the deference is that the autoexpect will build the automation script for you. The script you want to automate will be passed to autoexpect as a parameter and when you answer the questions and your answers will be saved in a file.

How can I use expect command in Linux?

expect command in Linux with Examples. expect command or scripting language works with scripts that expect user inputs. It automates the task by providing inputs. First we write a script that will be needing inputs from users and then we will write another script using expect to automate the task. Ok, so let’s write down

How to define variables in the Expect script?

The set command is using to define variables in Expect scripts like this: To define the arguments of the command line in the Expect scripts, we are going to use the following syntax: Here we define a variable TESTVAR which is equal to the first given argument.