How do I run an Expect file in Linux?
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How do I run an Expect file in Linux?
$ yum install expect The first line defines the expect command path which is #!/usr/bin/expect . 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.
How do you spawn in Unix?
SPAWN
- Under UNIX, the shell used (if any) is obtained from the SHELL environment variable. The NOSHELL keyword can be used to execute a command directly as a child process without starting a shell process.
- Under Windows, a Command Shell is opened.
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.
What is Exp_continue?
The command exp_continue allows expect itself to continue executing rather than returning as it normally would. This is useful for avoiding explicit loops or repeated expect statements.
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 is timeout in Expect script?
By default, the expect timeout is 10 seconds. If you don’t enter anything for the expect command, it times out in 20 seconds.
What is the difference between Spawn and fork?
Differences between Spawn and Fork Spawn is useful when you want to make a continuous data transfer in binary/encoding format — e.g. transferring a 1 Gigabyte video, image, or log file. Fork is useful when you want to send individual messages — e.g. JSON or XML data messages.
What is Interact in expect?
What is timeout in expect script?
What is expect in TCL?
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.