Keyboard Shortcuts for Command Erasure

C

The correct answer is C. Ctrl + u.

Keyboard shortcuts are a quick way to interact with command-line interfaces, saving time and improving productivity. Junos OS command-line interface (CLI) provides a set of keyboard shortcuts that can be used to perform various tasks.

The Ctrl + u keyboard shortcut is used to erase the entire current command. This shortcut is commonly used when you need to start over a command or if you entered an incorrect command. When you press Ctrl + u, it will erase all the text from the beginning of the current line to the cursor position, regardless of where the cursor is.

To better understand how Ctrl + u works, consider the following example. Suppose you have entered the following command:

sqlCopy code
user@router> show interfaces ge-0/0/0 extensive 

But then you realize that you entered the wrong interface name and want to start over. Instead of pressing backspace multiple times, you can use Ctrl + u to erase the entire command, like this:

sqlCopy code
user@router> <cursor position> 

After you press Ctrl + u, the entire command will be erased, and you will be left with an empty command prompt. You can then enter the correct command.

In summary, Ctrl + u is a handy keyboard shortcut that allows users to erase the entire current command in Junos OS CLI.