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MacOS X安装MySQL

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本文记录的是通过homebrew安装MySQL的过程

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$ brew install mysql  // 安装
$ mysql.server start // 启动
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$ mysql_secure_installation // 配置向导

Securing the MySQL server deployment.

Connecting to MySQL using a blank password.

VALIDATE PASSWORD PLUGIN can be used to test passwords
and improve security. It checks the strength of password
and allows the users to set only those passwords which are
secure enough. Would you like to setup VALIDATE PASSWORD plugin?

Press y|Y for Yes, any other key for No: n

Please set the password for root here.

New password: ******

Re-enter new password: ******
By default, a MySQL installation has an anonymous user,
allowing anyone to log into MySQL without having to have
a user account created for them. This is intended only for
testing, and to make the installation go a bit smoother.
You should remove them before moving into a production
environment.

Remove anonymous users? (Press y|Y for Yes, any other key for No) : y
Success.


Normally, root should only be allowed to connect from
'localhost'. This ensures that someone cannot guess at
the root password from the network.

Disallow root login remotely? (Press y|Y for Yes, any other key for No) : n

 ... skipping.
By default, MySQL comes with a database named 'test' that
anyone can access. This is also intended only for testing,
and should be removed before moving into a production
environment.


Remove test database and access to it? (Press y|Y for Yes, any other key for No) : y
 - Dropping test database...
Success.

 - Removing privileges on 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
Success.

All done!

查看配置文件my.cnf的位置

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$ mysqld --help --verbose | less
...
Default options are read from the following files in the given order:
/etc/my.cnf /etc/mysql/my.cnf /usr/local/etc/my.cnf ~/.my.cnf 
...

我们发现，在/etc/my.cnf文件并不存在。网上很多人说通过

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$ ls $(brew --prefix mysql)/support-files/my-*

能查看到配置文件，然而并不能。当前我的版本是：

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$ brew info mysql
mysql: stable 5.7.18 (bottled)
Open source relational database management system
https://dev.mysql.com/doc/refman/5.7/en/
Conflicts with: mariadb, mariadb-connector-c, mysql-cluster, mysql-connector-c, percona-server
/usr/local/Cellar/mysql/5.7.18_1 (320 files, 232.9MB) *
  Poured from bottle on 2018-05-31 at 11:19:46
From: https://github.com/Homebrew/homebrew-core/blob/master/Formula/mysql.rb

my.cnf配置文件的正确位置是在/usr/local/etc/my.cnf

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