Hi! I managed now to reproduce this. The purge step is not relevant, but simply the upgrade itself.
In clean Docker container with Debian unstable: $ apt install -y mariadb-server-10.6 -> install successful $ apt full-upgrade -y -> does nothing $ service mariadb restart Stopping MariaDB database server: mariadbd. Starting MariaDB database server: mariadbd. $ apt install mariadb-server -y The following packages will be REMOVED: mariadb-client-10.6 mariadb-client-core-10.6 mariadb-server-10.6 mariadb-server-core-10.6 The following NEW packages will be installed: mariadb-client mariadb-client-core mariadb-server mariadb-server-core pv $ service mariadb restart mariadb: unrecognized service -> upgrade successful, but service stopped working - the service file has no executable bit anymore. $ dpkg -l | grep -iE 'maria|mysql|galera' ii galera-4 26.4.11-1+b2 amd64 Replication framework for transactional applications ii libdbd-mariadb-perl 1.22-1+b1 amd64 Perl5 database interface to the MariaDB/MySQL databases ii libmariadb3:amd64 1:10.11.1-1 amd64 MariaDB database client library ii mariadb-client 1:10.11.1-1 amd64 MariaDB database client binaries rc mariadb-client-10.6 1:10.6.11-2 amd64 MariaDB database client binaries ii mariadb-client-core 1:10.11.1-1 amd64 MariaDB database core client binaries ii mariadb-common 1:10.11.1-1 all MariaDB common configuration files ii mariadb-server 1:10.11.1-1 amd64 MariaDB database server binaries rc mariadb-server-10.6 1:10.6.11-2 amd64 MariaDB database server binaries ii mariadb-server-core 1:10.11.1-1 amd64 MariaDB database core server files ii mysql-common 5.8+1.1.0 all MySQL database common files, e.g. /etc/mysql/my.cnf $ find /etc -name '*mariadb*' -type f -ls -rw-r--r-- 1 root root 6387 Jan 15 22:45 /etc/init.d/mariadb -rw-r--r-- 1 root root 1859 Jan 15 22:45 /etc/logrotate.d/mariadb -rw-r--r-- 1 root root 1126 Jan 8 01:45 /etc/mysql/mariadb.cnf -rw-r--r-- 1 root root 730 Jan 3 06:42 /etc/apparmor.d/usr.sbin.mariadbd -rw-r--r-- 1 root root 716 Jan 3 06:42 /etc/logcheck/ignore.d.paranoid/mariadb-server-10_6 -rw-r--r-- 1 root root 716 Jan 15 22:45 /etc/logcheck/ignore.d.paranoid/mariadb-server -rw-r--r-- 1 root root 2153 Jan 3 06:42 /etc/logcheck/ignore.d.server/mariadb-server-10_6 -rw-r--r-- 1 root root 2153 Jan 15 22:45 /etc/logcheck/ignore.d.server/mariadb-server -rw-r--r-- 1 root root 2153 Jan 3 06:42 /etc/logcheck/ignore.d.workstation/mariadb-server-10_6 -rw-r--r-- 1 root root 2153 Jan 15 22:45 /etc/logcheck/ignore.d.workstation/mariadb-server $ apt purge 'mariadb-*-10.6' -y The following packages will be REMOVED: mariadb-client-10.6* mariadb-server-10.6* $ find /etc -name '*mariadb*' -type f -ls -rw-r--r-- 1 root root 6387 Jan 15 22:45 /etc/init.d/mariadb -rw-r--r-- 1 root root 1859 Jan 15 22:45 /etc/logrotate.d/mariadb -rw-r--r-- 1 root root 1126 Jan 8 01:45 /etc/mysql/mariadb.cnf -rw-r--r-- 1 root root 730 Jan 3 06:42 /etc/apparmor.d/usr.sbin.mariadbd -rw-r--r-- 1 root root 716 Jan 15 22:45 /etc/logcheck/ignore.d.paranoid/mariadb-server -rw-r--r-- 1 root root 2153 Jan 15 22:45 /etc/logcheck/ignore.d.server/mariadb-server -rw-r--r-- 1 root root 2153 Jan 15 22:45 /etc/logcheck/ignore.d.workstation/mariadb-server -> purge works as expected
