How to read user input from BASH script?

How to read user input from BASH script?

To read the Bash user input, we use the built-in Bash command called read. It takes input from the user and assigns it to the variable. It reads only a single line from the Bash shell. Below is the syntax for its implementation. Follow the given examples to read user input from the Bash Script:

How to pass a variable with the READ command?

If we don’t pass any variable with the read command, then we can pass a built-in variable called REPLY (should be prefixed with the $ sign) while displaying the input. It can be explained using the below program: In this example, we enter the input on the same PROMPT by using the -p command line option as follows:

Is there a way to do this in a bash script?

In this script the prompt is “Please enter your name: ” the default value is “Ricardo” and the cursor would be after the default value. Is there a way to do this in a bash script? You can use parameter expansion, e.g. Including the default value in the prompt between brackets is a fairly common convention What does the :-Richard part do?

How does the bash script work for redirection?

By doing so we can create scripts that act as filters to modify data in specific ways for us. Bash accomodates piping and redirection by way of special files. Each process gets it’s own set of files (one for STDIN, STDOUT and STDERR respectively) and they are linked when piping or redirection is invoked.

What do you do with the READ command in Bash?

When you use read, you are communicating to the bash terminal that you want to capture the input from the user. By default, the command will create a variable to save that input to. Now let’s see some examples of read command to understand how you can use it in different situations. 1. Read command without options

How to hide user input in Linux script?

\\b \\b is needed to give the appearance of deleting the character to the left; just using \\b moves the cursor to the left, but leaves the character intact ( nondestructive backspace). By printing a space and moving back again, the character appears to have been erased (thanks, The “backspace” escape character ‘\\b’ in C, unexpected behavior?

Why is the read secret function empty in Bash?

The input to read_secret appears empty because it was not echoed to the terminal. Here is another that uses the -r option to preserve the backslashes in the input. This works because the read_secret function defined above passes all arguments it receives to the read command.