https://blog.touret.info/2020/04/24/ameliorer-le-temps-de-demarrage-de-debian-10/
systemd-analyze plot > plot.svg
sudo systemctl disable NetworkManager-wait-online.service
sudo systemctl edit apt-daily.timer
Y coller le contenu suivant:
[Timer] OnBootSec=15min
Puis:
sudo systemctl daemon-reload