Arch Linux: install mysql 8

$ sudo pacman -S mysql 
$ sudo systemctl start mysql.service

arch linux mysql   Table 'mysql.plugin' doesn't exist  Please perform the MySQL upgrade procedure

ref:

https://unix.stackexchange.com/questions/669809/problem-running-mysql-in-arch-linux

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       https://dev.mysql.com/doc/refman/5.7/en/data-directory-initialization.html#data-directory-initialization-overview