Homebrew(brew)安装MySQL成功后无法登录

Homebrew简称brew，OSX上的软件包管理工具，在Mac终端可以通过brew安装、更新、卸载各种软件，(简直就是神器级武器)。

废话不多说，没安装brew自己去百度学习安装，这里就不多说了。

1、首先在终端使用命令，这是搜索brew上的MySQL各个版本

brew search mysql

2、选择自己需要的版本，安装MySQL,这里我安装为5.7版本

brew install mysql@5.7

3、执行后稍等片刻，它会自动安装，以下为安装成功后显示的信息

MySQL is configured to only allow connections from localhost by default

To connect run:
    mysql -uroot

mysql@5.7 is keg-only, which means it was not symlinked into /usr/local,
because this is an alternate version of another formula.

If you need to have mysql@5.7 first in your PATH run:
  echo 'export PATH="/usr/local/opt/mysql@5.7/bin:$PATH"' >> ~/.bash_profile

For compilers to find mysql@5.7 you may need to set:
  export LDFLAGS="-L/usr/local/opt/mysql@5.7/lib"
  export CPPFLAGS="-I/usr/local/opt/mysql@5.7/include"


To have launchd start mysql@5.7 now and restart at login:
  brew services start mysql@5.7
Or, if you don't want/need a background service you can just run:
  /usr/local/opt/mysql@5.7/bin/mysql.server start
==> Summary
🍺  /usr/local/Cellar/mysql@5.7/5.7.23: 317 files, 234.1MB

以上信息需注意系统环境变量的配置：

echo 'export PATH="/usr/local/opt/mysql@5.7/bin:$PATH"' >> ~/.bash_profile

# 文件修改以后执行写入bash_profile以后执行立即生效
sousers ~/.bash_profile

4、最后执行,启动MySQL

mysql.server start

# 显示如下，则安装成功
Starting MySQL
. SUCCESS! 

附加：

终端输入

mysql -u root

如果你运气不好,出现如下错误,应该是修改初始密码没有成功

ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES),

解决步骤

(1)终端输入 mysqld_safe --skip-grant-tables 显示如下

mysqld_safe --skip-grant-tables

# 显示如下
2017-03-21T11:44:11.6NZ mysqld_safe Logging to '/usr/local/var/mysql/huang.local.err'.
2017-03-21T11:44:11.6NZ mysqld_safe Logging to '/usr/local/var/mysql/huang.local.err'.
2017-03-21T11:44:11.6NZ mysqld_safe A mysqld process already exists

(2)再次输入 mysql -u root 显示如下

Welcome to the MySQL monitor.  Commands end with ; or g.
Your MySQL connection id is 10
Server version: 5.7.17 Homebrew
Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or 'h' for help. Type 'c' to clear the current input statement.
mysql>

(3)终端输入 use mysql显示如下

Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A
Database changed
mysql>

(4)修改密码 UPDATE mysql.user SET authentication_string=PASSWORD('你的密码') WHERE User='root';

成功  Query OK, 1 row affected, 1 warning (0.05 sec)
Rows matched: 1  Changed: 1  Warnings: 1

到这来就完成啦。
最后重新登终端输入：
mysql -u root -p
按回车键，输入设置的密码即可登录

以上所述给大家介绍的解决mac使用homebrew安装MySQL，并出现无法登陆问题的解决方案,希望对大家有所帮助。