Quick Answer: How install expect command in Linux?

How do you install expect in Linux?

Solution:

  1. Download the ecpect package from the below link. http://sourceforge.net/projects/expect/
  2. Install the required dependecy packages “Tcl/Tk” language toolkit. # yum install tcl.
  3. Install the “expect” package using the below commands.

9 нояб. 2011 г.

What is expect command in Linux?

expect command or scripting language works with scripts that expect user inputs. It automates the task by providing inputs. // We can install expect command using following if not installed.

How use Linux expect?

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.
expect Waits for program output.
send Sends a reply to your program.
interact Allows you to interact with your program.

How install Ubuntu expect?

Detailed Instructions:

  1. Run update command to update package repositories and get latest package information.
  2. Run the install command with -y flag to quickly install the packages and dependencies. sudo apt-get install -y expect.
  3. Check the system logs to confirm that there are no related errors.

How do I automate a Linux command?

Here are my steps, in order:

  1. launch putty, choose hostname & port, click Open (would love to script/automate this 1st part too)
  2. linux shell/terminal opens.
  3. I enter my login and pwd.
  4. I enter this command: sudo su – psoftXXX.
  5. I enter my pwd again and hit enter.
  6. I am presented with a little cmd-shell menu and a prompt. …
  7. cd /
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15 февр. 2013 г.

How do you check if expect is installed in Linux?

a) On Arch Linux

Use pacman command to check if the given package is installed or not in Arch Linux and its derivatives. If the below command returns nothing then the ‘nano’ package is not installed in system. If it is installed, the respective name will be displayed as follows.

How do I expect in bash?

How to Use Expect In Bash Script

  1. Step 1 : Create a new file. vi expectcmd.
  2. Step 2 : Copy and paste below given content in file. Change the value as per your information in variables – …
  3. Step 3: Make your file executable by owner of file , run the given below command. chmod 750 expectcmd.
  4. Step 4: Give commands as argument along with expectcmd script.

What is Interact in Expect?

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.

What does it mean to spawn a shell?

The SPAWN procedure spawns a child process to execute a command or series of commands. The result of calling SPAWN depends on the platform on which it is being used: Under UNIX, the shell used (if any) is obtained from the SHELL environment variable. … Under Windows, a Command Shell is opened.

What is expect Tool?

Expect is a tool for automating interactive applications such as telnet, ftp, passwd, fsck, rlogin, tip, etc. … You will find that Expect is an absolutely invaluable tool – using it, you will be able to automate tasks that you’ve never even thought of before – and you’ll be able to do this automation quickly and easily.

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What type of terminal does CLI expect?

Expect is used to automate control of interactive applications such as Telnet, FTP, passwd, fsck, rlogin, tip, SSH, and others. 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.

How do you use expect in Python?

There are two common methods in Pexpect — expect() and send() (or sendline() which is like send() with a linefeed). With the expect() command you cause your script to wait for the child application to return a string. The string can be regular expression. The send() method writes a string to the child application.

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