After upgrading from 15.10 to 16.04, I am receiving the following error on apt-get update
:
Reading package lists... Done
E: Failed to fetch http://security.ubuntu.com/ubuntu/dists/xenial-security/restricted/source/Sources Empty files can't be valid archives
E: Failed to fetch http://security.ubuntu.com/ubuntu/dists/xenial-security/universe/source/Sources Empty files can't be valid archives
E: Failed to fetch http://security.ubuntu.com/ubuntu/dists/xenial-security/multiverse/source/Sources Empty files can't be valid archives
E: Failed to fetch http://security.ubuntu.com/ubuntu/dists/xenial-security/restricted/binary-amd64/Packages Empty files can't be valid archives
E: Failed to fetch http://security.ubuntu.com/ubuntu/dists/xenial-security/restricted/binary-i386/Packages Empty files can't be valid archives
E: Failed to fetch http://security.ubuntu.com/ubuntu/dists/xenial-security/restricted/i18n/Translation-en Empty files can't be valid archives
E: Failed to fetch http://security.ubuntu.com/ubuntu/dists/xenial-security/universe/binary-amd64/Packages Empty files can't be valid archives
E: Failed to fetch http://security.ubuntu.com/ubuntu/dists/xenial-security/universe/binary-i386/Packages Empty files can't be valid archives
E: Failed to fetch http://security.ubuntu.com/ubuntu/dists/xenial-security/universe/i18n/Translation-en Empty files can't be valid archives
E: Failed to fetch http://security.ubuntu.com/ubuntu/dists/xenial-security/multiverse/binary-amd64/Packages Empty files can't be valid archives
E: Failed to fetch http://security.ubuntu.com/ubuntu/dists/xenial-security/multiverse/binary-i386/Packages Empty files can't be valid archives
E: Some index files failed to download. They have been ignored, or old ones used instead.
Does anyone know how to solve this error?