upgrayedd

Mom,

When you upgrade to bullseye, you need to change your security source from

deb http://security.debian.org/ buster/updates main

to

deb http://security.debian.org/debian-security bullseye-security main

However, that will silently fail to work if you forget to update the file in /etc/apt/preferences.d to add something like this stanza:

Explanation: Debian security
Package: *
Pin: release o=Debian,n=bullseye-security
Pin-Priority: 990