So I forgot my Unix password and I tried following some solutions online.
I used the above link to reset my password and it seems to have done the job but I
need to install 'Make' and the command sudo asks password before installation. I
enter the new password and it doesn't accept it. Does anyone have any ideas on this?
Just in case others are having a similar problem, we fixed this by reseting the personal
password, and then using the personal password when asked by sudo:
<type in root's existing password>
<type in new password>
<type in new password again>
sudo apt install make
<type in new personal password>