Error :
Renaming removed key_buffer and myisam-recover options (if present)
mysql_upgrade: Got error: 1524: Plugin 'unix_socket' is not loaded while connecting to the MySQL server
Upgrade process encountered error and will not continue.
mysql_upgrade failed with exit status 11
dpkg: error processing package mysql-server-5.7 (--configure):subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing:mysql-server-5.7
Solution :
If you have installed MariaDB and then you have removed it to install mysql. This can be the cause of this issue. If you try to purge all old config filess and set everything up from scratch then it should work.
Take Back up your important data before doing it.
Renaming removed key_buffer and myisam-recover options (if present)
mysql_upgrade: Got error: 1524: Plugin 'unix_socket' is not loaded while connecting to the MySQL server
Upgrade process encountered error and will not continue.
mysql_upgrade failed with exit status 11
dpkg: error processing package mysql-server-5.7 (--configure):subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing:mysql-server-5.7
Solution :
If you have installed MariaDB and then you have removed it to install mysql. This can be the cause of this issue. If you try to purge all old config filess and set everything up from scratch then it should work.
Take Back up your important data before doing it.
# sudo apt purge mysql-client-5.7 mysql-client-core-5.7 mysql-common mysql-server-5.7 mysql-server-core-5.7 mysql-server
# sudo apt update
# sudo apt dist-upgrade && sudo apt autoremove && sudo apt -f install
# sudo apt install mysql-server
