1.安装mysql

# brew安装mysql
brew install mysql

2.启动服务

brew services start mysql

3.安全启动向导设置密码

mysql_secure_installation

Securing the MySQL server deployment.

。。。。。
secure enough. Would you like to setup VALIDATE PASSWORD component?

Press y|Y for Yes, any other key for No:  # y表示密码长度必须要设置为8位以上
Please set the password for root here.

New password:  # 给root设置密码

Re-enter new password:  # 确认密码

。。。。。。
environment.

Remove anonymous users? (Press y|Y for Yes, any other key for No) : y   # 移除不用密码的那个账户
Success.


。。。。
the root password from the network.

Disallow root login remotely? (Press y|Y for Yes, any other key for No) : n # n表示允许root远程登录

。。。。。。
Remove test database and access to it? (Press y|Y for Yes, any other key for No) : y # 删除test库以及对test库的访问权限。
 - Dropping test database...
Success.

。。。。。。
Reloading the privilege tables will ensure that all changes
made so far will take effect immediately.

Reload privilege tables now? (Press y|Y for Yes, any other key for No) : y # 是否重新加载权限表
Success.

All done! 

或

3.使用默认免密登陆设置密码

mysql -u root

alter user 'root'@'localhost' identified with 你的密码 by 'root';

4查看.my.cnf配置文件

mysqld --help --verbose | less

brew安装的mysql必须使用brew命令，mysql.server stop不起作用

# 启动 mysql, 并设置为开机启动
brew services start mysql

# 关闭 mysql
brew services stop mysql

# 重启 mysql
brew services restart mysql