Reading package lists... Done
N: Ignoring file 'trillian.list.2' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension
N: Ignoring file 'trillian.list.1' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension
W: GPG error: http://www.trillian.im stable InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY B91B4485DFBBD4C8
W: There is no public key available for the following key IDs:
1397BC53640DB551
W: Duplicate sources.list entry http://download.videolan.org/pub/debian/stable/  Packages (/var/lib/apt/lists/download.videolan.org_pub_debian_stable_Packages)
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Calculating upgrade... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
N: Ignoring file 'trillian.list.2' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension
N: Ignoring file 'trillian.list.1' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension
N: Ignoring file 'trillian.list.2' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension
N: Ignoring file 'trillian.list.1' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension