新建/etc/mysql/myopt.cnf文件，并将改动部分写入该文件，之后在/etc/mysql/my.cnf中追加一句把这个文件include进来：

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!include /etc/mysql/myopt.cnf

例如仅仅修改一下绑定地址和端口

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# /etc/mysql/myopt.cnf
[mysqld]
bind-address 	= 0.0.0.0
port            = 50006