Ubuntu Tips – Display Asterisks When Typing Your Password in Terminal

 terminal

sudo visudo 

Make a new line:

Defaults        pwfeedback

under the line:

Defaults        env_reset

 

Now save the changes. Press Ctrl+X, type y to answer yes, press Enter to accept default file name.

 

source : https://ubuntuhandbook.org/index.php/2014/08/ubuntu-display-asterisks-when-typing-password-terminal/