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How to wait for keyboard input in shell script?
Inside the loop, I would like the script to wait for keyboard input (basically just “press Enter to continue”. However, the following code inside the loop doesn’t cause the script to stop there—apparently it takes its input from the supplied file rather than the keyboard.
How to read inside a while loop in Bash?
Or, you can swap stdin and unit 3 in that version — read the file with unit 3, and just leave stdin alone: It looks like you read twice, the read inside the while loop is not needed. Also, you don’t need to invoke the cat command:
Why does while loop not run in Python?
Problem is that if the user initially enters 1, 2 or 3, program doesn’t run. But if user enters something other than 1, 2 or 3 the first time, the program behaves like I want it to. It will not run when 1,2,3 are entered because the while loop excludes those numbers.
How to use user input in Python program?
I’m trying to write a Python program where it asks user to make selection using 1, 2 or 3. If user doesn’t enter those, it prompts user to enter only those numbers. Once the user enters 1, 2 or 3, the program then asks it AGAIN to enter 1, 2 or 3.
How can I accept input from the keyboard?
You can accept input from the keyboard and assign an input value to a user defined shell variable using read command . 2.1.1 But how do I use $IFS and read command together?
When to execute JavaScript function when keyboard key is pressed?
But if you want to capture a DOM element, then you have to execute the code after the DOM element occurs (because the script is interpreted as it’s found, if the DOM element doesn’t exist yet, the selector engine can’t find it. If this doesn’t make sense say something, and an article shall be found).
How does the READ command read the input?
The read command reads input from $nameservers variable. The default value of $IFS is used to assign values to three separate variables. Your input is broken into tokens using $IFS and assigned to three variables. In other words, the IFS variable worked as token delimiter or separator.