incremental upgrades: do not try to update when booted from read-only media
Should not try to update a Tails booted from DVD.
Tails::Persistence::Setup
has code to check if the system was booted
from a optical / USB device. It should not be too hard to reuse it.
Parent Task: #5922 (closed)
Related issues
- Related to #6147
Original created by @tails on 5651 (Redmine)