read:tldr:7ab7f

The command "read ${variable}" is used in a shell script or command line interface to read input from the user and assign it to the specified variable.

Here's how it works:

1. The "read" command prompts the user to enter input.
2. When the user enters their input and presses enter, the value is stored.
3. The value entered by the user is then assigned to the variable specified within the "${}".

For example, let's say we have the following code in a shell script:

echo "Enter your name: "
read ${name}
echo "Hello, ${name}!"

When this script runs, it first displays the message "Enter your name:". The user can then type in their name and press enter. The value entered by the user is stored in the variable "name". The script then displays "Hello, " followed by the value of the "name" variable.

So if the user enters "John" as their name, the script will output "Hello, John!".