MySql安装
1 安装包准备
1）卸载自带的Mysql-libs
rpm -qa | grep -i -E mysql|mariadb | xargs -n1 sudo rpm -e --nodeps
2）将安装包和JDBC驱动上传
01_mysql-community-common-5.7.29-1.el7.x86_64.rpm
02_mysql-community-libs-5.7.29-1.el7.x86_64.rpm
03_mysql-community-libs-compat-5.7.29-1.el7.x86_64.rpm
04_mysql-community-client-5.7.29-1.el7.x86_64.rpm
05_mysql-community-server-5.7.29-1.el7.x86_64.rpm
mysql-connector-java-5.1.48.jar
2 安装MySql
1）安装mysql依赖
sudo rpm -ivh 01_mysql-community-common-5.7.29-1.el7.x86_64.rpm
sudo rpm -ivh 02_mysql-community-libs-5.7.29-1.el7.x86_64.rpm
sudo rpm -ivh 03_mysql-community-libs-compat-5.7.29-1.el7.x86_64.rpm
2）安装mysql-client
sudo rpm -ivh 04_mysql-community-client-5.7.29-1.el7.x86_64.rpm
3）安装mysql-server
sudo rpm -ivh 05_mysql-community-server-5.7.29-1.el7.x86_64.rpm
4）启动mysql
sudo systemctl start mysqld
5）查看mysql密码
sudo cat /var/log/mysqld.log | grep password
3 配置MySql
配置只要是root用户+密码，在任何主机上都能登录MySQL数据库。
1）用刚刚查到的密码进入mysql（如果报错，给密码加单引号）
mysql -uroot -p’password’
2）设置复杂密码(由于mysql密码策略，此密码必须足够复杂)
mysql> set password=password(“Qs23=zs32”);
3）更改mysql密码策略
mysql> set global validate_password_length=4;
mysql> set global validate_password_policy=0;
4）设置简单好记的密码
mysql> set password=password(“000000”);
5）进入msyql库
mysql> use mysql
6）查询user表
mysql> select user, host from user;
7）修改user表，把Host表内容修改为%
mysql> update user set host="%" where user=“root”;
8）刷新
mysql> flush privileges;
9）退出
mysql> quit;