Enable password feedback when entering sudo password
From Pengwings
You need to add pwfeedback to the sudo defaults, there are two ways to do it, the latter is probably better
By editing /etc/sudoers
Run visudo (allows editing sudo config safely)
sido visudo
Find 'Defaults' section:
Defaults env_reset
Add pwfeedback to 'Defaults'
Defaults env_reset,pwfeedback
By adding a special sudoers.d custom rule file
Alternatively you can also add the following file
/etc/sudoers.d/enable-pwfeedback
Containing this string:
Defaults pwfeedback