You can enable the password feedback feature in /etc/sudoers file, but first create a backup of the file, then open it for editing using the visudo command.
$ sudo cp /etc/sudoers /etc/sudoers.bak $ sudo visudo
Search for the following line.
And append pwfeedback to it, so that it looks like this.
Now press Esc key and type
:wq to save and close the file. But if you are using nano editor, save the file by hitting “Ctrl+x” and then
“y” followed by “ENTER” to close it.
Then run the command below to reset your terminal for the above changes to start working.