I recently built a new machine, using Debian Jessie. Soon after I upgraded  to stretch, and everything seems fine except, one stubborn error which keeps popping up when I run apt-get update.Err:12 http://security.debian.org stretch/updates/non-free Translation-en ***Could not open file /var/lib/apt/lists/partial/security.debian.org_dists_stretch_updates_non-free_i18n_Translation-en.bz2 - open (13: Permission denied) [IP: 212.211.132.32 80]****and finallyE: Failed to fetch http://security.debian.org/dists/stretch/updates/non-free/i18n/Translation-en  Could not open file /var/lib/apt/lists/partial/security.debian.org_dists_stretch_updates_non-free_i18n_Translation-en.bz2 - open (13: Permission denied) [IP: 212.211.132.32 80]At the time there was little advice about how the file should be formed, I simply took my existing sources.list, and replaced any mention of Jessie with StretchCan anyone pitch in with ideas?
apt-get permission denied
debian;apt