Comments on How to Upgrade from Debian 11 to Debian 12

What should be done in the case of having used the "SURY repository" to add PHP 8.x to a debian 11 system using this guide?

https://www.howtoforge.com/ispconfig-php-debian/#-set-the-os-default-php-back-to-the-correct-version

Configuration file '/etc/rspamd/rspamd.conf' ==> Modified (by you or by a script) since installation. ==> Package distributor has shipped an updated version.   What would you like to do about it ?  Your options are:    Y or I  : install the package maintainer's version    N or O  : keep your currently-installed version      D     : show the differences between the versions      Z     : start a shell to examine the situation The default action is to keep your current version.*** rspamd.conf (Y/I/N/O/D/Z) [default=N] ? Y

On our LXC container we get this error message:

WARNING: /usr/bin/fgrep is a broken symlink and has been renamed! FATAL ERROR: Both /bin/egrep and /usr/bin/egrep exist.

configure database for roundcube with dbconfig-common ? asking this question. Y or N ?

upgrade debian 12 ispconfig

There is a missing step between apt-get upgrade --without-new-pkgs and apt-get full-upgrade, the Debian documentation add the step apt-get upgrade.

So after apt-get update:

apt-get upgrade --without-new-pkgs

Then:

apt-get upgrade

To finish with:

apt-get full-upgrade

The first install updates which doe not require installing new packages, then we install updates which does not require removing any package, then we install the rest which can require to remove some packages.

About SURY repository: by modifying all sources files, packages should also be updated.