I tried to reinstall sopcast with the following command:
sudo tee -a /etc/apt/sources.list
but nothing happened, then I try the next command:
sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys CD30EE56
and I get the following error:
E: Type 'sudo' is not known on line 60 in source list /etc/apt/sources.list E: The list of sources could not be read.
Could anyone please help me?