Linux安装MySQL

1.下载MySQL安装包

2.在Linux创建Linuxmysql文件夹，并解压
mkdir linuxmysql
tar -xvf mysql-8.0.26-1.el7.x86_64.rpm-bundle.tar -C linuxmysql
大C是安装到指定目录

3.切换到linuxmysql目录按顺序解压
cd linuxmysql
rpm ivh mysql-community-common-8.0.26-1.e17.x86_64.rpm
rpm -ivh mysql-community-client-plugins-8.0.26-1.el7.x86_64.rpm 
yum remove mysql-libs
rpm ivh mysql-community-libs-8.0.26-1.e17.x86_64.rpm
rpm ivh mysql-community-libs-compat-8.0.26-1.e17.x86_64.rpm
rpm -ivh mysql-community-devel-8.0.26-1.e17.x86_64.rpm
rpm -ivh mysql-community-client-8.0.26-1.e17.x86_64.rpm
rpm -ivhmysql-community-server-8.0.26-1.e17.x86_64.rpm

4.查询自动生成的root密码
grep 'temporary password' /var/log/mysqld.log

5设置密码复杂度方面学习
set global validate_password.policy = 0;
set global validate_password.length = 6;

6.修改root密码
ALTER USER 'root'@'localhost' IDENTIFIED BY '123456';

7.创建用户
默认的root用户只能当前节点localhost访问，是无法远程访问的，我们需创建一个root账户，用户远程访问;
create user 'root'@'%' identified with mysql_native_password by '123456';

7.给root用户分配权限
grant all on *.* to 'root'@'%';