I got the following error when trying to run sudo apt-get update
in Ubuntu 16.04.
predator@kmb:~$ sudo apt-get update
[sudo] password for predator:
E: Type '<!DOCTYPE' is not known on line 1 in source list /etc/apt/sources.list.d/medibuntu.list
E: The list of sources could not be read.
predator@kmb:~$
/etc/apt/sources.list.d/medibuntu.list
.../etc/apt/sources.list.d/medibuntu.list