【devOps】MySQL安装

二、yum方式安装MySQL

#1、卸载MariaDB

rpm -qa | grep mariadb #查询mariadb

rpm -e --nodeps mariadb-libs-5.5.47-1.el7_2.x86_64 #根据前面命令查询结果卸载

#2、关闭selinux

vim /etc/selinux/config

#把SELINUX=enforcing改为SELINUX=disabled后存盘退出重启机器；该项用以解决启动MySQL service服务报错：ERROR!The server quit without updating PID file

#3、安装MySQL

#yum list | grep mysql

rpm -Uvh http://dev.mysql.com/get/mysql57-community-release-el7-7.noarch.rpm

yum install mysql-community-server

service mysqld start #启动服务

cat /var/log/mysqld.log #或者使用vim查找，命令找到A temporary password is generated for root@localhost: qW/&5(2v7Q%g 读取root初始密码 qW/&5(2v7Q%g

#4、更改密码

mysql -uroot -p #输入密码qW/&5(2v7Q%g

SQL>set global validate_password_policy=0;

SQL>set global validate_password_length=4;

SQL>ALTER USER USER() IDENTIFIED BY ‘root123’;

#5、