W: https://download.01.org/gfx/ubuntu/16.04/main/dists/xenial/InRelease: Signature by key 09D6--redacted for posting--61D39 uses weak digest algorithm (SHA1)
W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://download.alephobjects.com/ao/aodeb wheezy Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 0EB44AD9A71B242A
W: Failed to fetch http://download.alephobjects.com/ao/aodeb/dists/wheezy/Release.gpg  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 0EB44AD9A71B242A
W: Some index files failed to download. They have been ignored, or old ones used instead.