m@samsung:~$ sudo rm /var/lib/apt/lists/* -vf
[sudo] password for m: 
rm: cannot remove `/var/lib/apt/lists/partial': Is a directory
m@samsung:~$ sudo apt-get update
N: Ignoring file 'gnomebaker.lis' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension
E: Malformed line 1 in source list /etc/apt/sources.list.d/gnomebaker.list (URI parse)
E: The list of sources could not be read.
m@samsung:~$