richard@richard-Predator-G3120:~$ sudo add-apt-repository ppa:michael-gruz/canon
[sudo] password for richard:
More info: https://launchpad.net/~michael-gruz/+archive/ubuntu/canon
Press [ENTER] to continue or Ctrl-c to cancel adding it.
E: Type 'sudo' is not known on line 2 in source list /etc/apt/sources.list.d/signal-xenial.list
E: The list of sources could not be read.