20200112: sudo not recognising my password

 From <<https://askubuntu.com/questions/711663/sudo-doesnt-recognize-correct-password>>:

I had to log into the virtual terminal via my username and run passwd username to get a new password. The surprising thing was that changing the password helped when i am extremely confident about my previous password.

answered Dec 21 '15 at 16:30

user221478

 

I thought this was illogical until I tried it and found it worked.