Public bug reported: First note please that while Bionic https://packages.ubuntu.com/bionic- updates/amd64/mysql-server-5.7/filelist packaged auth_socket.so Focal does not do so. https://packages.ubuntu.com/focal/amd64/mysql- server-8.0/filelist
Yet /var/lib/dpkg/info/mysql-server-8.0.postinst tries to install it and even worse it uses despite it does not exist: echo "ALTER USER 'root'@'localhost' IDENTIFIED WITH 'auth_socket';" >> "$initfile" After every MySQL upgrade I need to restart with --skip-grant-tables and undo this because it becomes impossible to log in. Also for d in $mysql_statedir $mysql_filesdir $mysql_keyringdir $mysql_logdir $mysql_rundir do if [ ! -d "$d" -a ! -L "$d" ]; then mkdir "$d"; fi chown -R mysql:mysql $d chmod 0700 $d done This makes /var/run/mysqld 0700 which makes it impossible for non-root users to access MySQL over the socket which is inside /var/run/mysqld ** Affects: mysql-8.0 (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1972046 Title: mysql-server-8.0.postinst tries to install nonexistent plugin and sets the wrong permissions To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mysql-8.0/+bug/1972046/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs