windows系统安装：
https://blog.csdn.net/weixin_43291055/article/details/92617156
linux系统安装:
https://www.cnblogs.com/starof/p/4680083.html
mac安装：
http://www.voidcn.com/article/p-ftvwixxf-p.html
brew安装
https://blog.csdn.net/w605283073/article/details/80417866
修改密码
https://blog.csdn.net/qq_33285112/article/details/78982766
mysql 登录
mysql -u root -p
mysql -h ip -u root -p
添加环境变量
在命令行输入mysql -uroot -p命令会提示没有commod not found
把mysql安装目录，比如MYSQLPATH/bin/mysql，映射到/usr/local/bin目录下：
# cd /usr/local/bin
# ln -fs /MYSQLPATH/bin/mysql mysql
