下面是my.cnf的全部內容：
#
# The MySQL database server configuration file.
#
# You can copy this to one of:
# - "/etc/mysql/my.cnf" to set global options,
# - "~/.my.cnf" to set user-specific options.
#
# One can use all long options that the program supports.
# Run program with --help to get a list of available options and with
# --print-defaults to see which it would actually understand and use.
#
# For explanations see
# http://dev.mysql.com/doc/mysql/en/server-system-variables.html
#
# * IMPORTANT: Additional settings that can override those from this file!
# The files must end with '.cnf', otherwise they'll be ignored.
#
!includedir /etc/mysql/conf.d/
!includedir /etc/mysql/mysql.conf.d/然後加入修改字元的兩句話：
[mysql]
default-character-set=utf8
[mysqld]
character-set-server=utf8然後就不能運行了
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)
把新加入的兩句話用
#註解掉試一下，能不能啟動（排除新引入配置出錯）運行
mysqld status查看Mysql目前啟動狀態（排除因未關閉導致無法啟動）運行使用者權限是否發生變化，如之前用
root，現在用user（排除權限問題）如果第一步就可以啟動，表示新配置有問題，根據回應Mysql版本查一下啟動參數是不是寫錯，以上。