Traceback (most recent call last):
File "./mfdiff", line 304, in <module>
main()
File "./mfdiff", line 226, in main
cache=get_cache(cache_d, cache)
File "./mfdiff", line 135, in get_cache
cache.update()
File "/usr/lib/python2.7/dist-packages/apt/cache.py", line 464, in update
raise FetchFailedException(e)
apt.cache.FetchFailedException: W:GPG error: http://archive.ubuntu.com/ubuntu xenial InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5 NO_PUBKEY 3B4FE6ACC0B21F32, E:The repository 'http://archive.ubuntu.com/ubuntu xenial InRelease' is not signed., W:Updating from such a repository can't be done securely, and is therefore disabled by default., W:See apt-secure(8) manpage for repository creation and user configuration details., W:GPG error: http://archive.ubuntu.com/ubuntu xenial-updates InRelease: The
following signatures couldn't be verified because the public key is not available:
NO_PUBKEY 40976EAF437D05B5 NO_PUBKEY 3B4FE6ACC0B21F32, E:The repository 'http://archive.ubuntu.com/ubuntu xenial-updates InRelease' is not signed., W:Updating from such a repository can't be done securely, and is therefore disabled by default., W:See apt-secure(8) manpage for repository creation and user configuration details., W:GPG error: http://archive.ubuntu.com/ubuntu xenial-security InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5 NO_PUBKEY 3B4FE6ACC0B21F32, E:The repository 'http://archive.ubuntu.com/ubuntu xenial-security InRelease' is not signed., W:Updating from such a repository can't be done securely, and is therefore disabled by default., W:See apt-secure(8) manpage for repository creation and user configuration details., W:GPG error: http://archive.ubuntu.com/ubuntu xenial-proposed InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5 NO_PUBKEY 3B4FE6ACC0B21F32, E:The repository 'http://archive.ubuntu.com/ubuntu xenial-proposed InRelease' is not signed.