How do I run an expect script in Linux?

How do you run an expect command?

On the second line of code, we disable the timeout. Then start our script using spawn command. We can use spawn to run any program we want or any other interactive script.

Expect Command.

spawn Starts a script or a program.
send Sends a reply to your program.
interact Allows you to interact with your program.

How do I run a script manually in Linux?

Steps to execute a shell script in Linux

  1. Create a new file called demo.sh using a text editor such as nano or vi in Linux: nano demo.sh.
  2. Add the following code: #!/bin/bash. …
  3. Set the script executable permission by running chmod command in Linux: chmod +x demo.sh.
  4. Execute a shell script in Linux: ./demo.sh.

What does expect command do in Linux?

The Linux expect command takes script writing to an entirely new level. Instead of automating processes, it automates running and responding to other scripts. In other words, you can write a script that asks how you are and then create an expect script that both runs it and tells it that you’re ok.

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Which command is used to run Linux commands or scripts in an expect script?

spawn – The spawn command is used to launch a script or program such as shell, SSH, FTP, Telnet, SCP and so on. Basically, it will start a script or a program. interact – The interact command allows you to interact with your program.

How do you check if expect is installed in Linux?

The dpkg-query command can be used to show if a specific package is installed in your system. To do it, run dpkg-query followed by the -l flag and the name of the package you want information about.

How do you run a script?

Steps to write and execute a script

  1. Open the terminal. Go to the directory where you want to create your script.
  2. Create a file with . sh extension.
  3. Write the script in the file using an editor.
  4. Make the script executable with command chmod +x .
  5. Run the script using ./.

How do I run a .sh script in terminal?

GUI method to run . sh file

  1. Select the file using mouse.
  2. Right-click on the file.
  3. Choose Properties:
  4. Click Permissions tab.
  5. Select Allow executing file as a program:
  6. Now click the file name and you will be prompted. Select “Run in the terminal” and it will get executed in the terminal.

How do I run a shell script in Ubuntu terminal?

The way professionals do it

  1. Open Applications -> Accessories -> Terminal.
  2. Find where the .sh file. Use the ls and cd commands. ls will list the files and folders in the current folder. Give it a try: type “ls” and press Enter. …
  3. Run the .sh file. Once you can see for example script1.sh with ls run this: ./script.sh.
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How install expect?

How to Install expect with apt-get?

  1. Step 1: Open terminal with su access and enter the command as shown below:
  2. apt-get install expect -y.
  3. Step 2: After completion, the install command exits and instructs the user to restart the running instances of expect if it is running already.

What is Interact command in expect script?

Interact is an Expect command which gives control of the current process to the user, so that keystrokes are sent to the current process, and the stdout and stderr of the current process are returned.

How do you send Ctrl D in expect script?

You can type ctrl + V , ctrl + D to get the literal byte sequence in your expect script. Expect will then send this exactly as if you interactively typed ctrl + D .

What type of terminal does CLI expect?

Expect uses pseudo terminals (Unix) or emulates a console (Windows), starts the target program, and then communicates with it, just as a human would, via the terminal or console interface.

What is an expect file?

Expect is a UNIX scripting and testing utility which can be used with SSH-based applications, like the Oracle VM CLI. Expect scripts can have any file name suffix you like, though they generally have an .exp extension.

How do bash scripts work?

A Bash script is a text file containing a series of commands. Any command that can be executed in the terminal can be put into a Bash script. Any series of commands to be executed in the terminal can be written in a text file, in that order, as a Bash script. Bash scripts are given an extension of .

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