Preparing to unpack .../mysql-server-5.7_5.7.22-0ubuntu18.04.1_amd64.deb ... Unpacking mysql-server-5.7 (5.7.22-0ubuntu18.04.1) ... Selecting previously unselected package mysql-server. Preparing to unpack .../mysql-server_5.7.22-0ubuntu18.04.1_all.deb ... Unpacking mysql-server (5.7.22-0ubuntu18.04.1) ... Setting up libevent-core-2.1-6:amd64 (2.1.8-stable-4build1) ... Processing triggers for ureadahead (0.100.0-20) ... Processing triggers for libc-bin (2.27-3ubuntu1) ... Setting up libaio1:amd64 (0.3.110-5) ... Processing triggers for systemd (237-3ubuntu10) ... Processing triggers for man-db (2.8.3-2) ... Setting up mysql-client-core-5.7 (5.7.22-0ubuntu18.04.1) ... Setting up mysql-server-core-5.7 (5.7.22-0ubuntu18.04.1) ... Setting up mysql-client-5.7 (5.7.22-0ubuntu18.04.1) ... Setting up mysql-server-5.7 (5.7.22-0ubuntu18.04.1) ... update-alternatives: error: alternative path /etc/mysql/mysql.cnf doesn't exist dpkg: error processing package mysql-server-5.7 (--configure): installed mysql-server-5.7 package post-installation script subprocess returned error exit status 2