Linux下安装MySQL过程(安装数据库、修改密码和端口、修改存储路径、开启远程访问)

mkdir /demo

mkdir mysql-8.0.28
tar -zxvf mysql-8.0.28-1.el7.x86_64.rpm-bundle.tar mysql-8.0.28

rpm -ivh mysql-community-common-8.0.28-1.el7.x86_64.rpm 
rpm -ivh mysql-community-client-plugins-8.0.28-1.el7.x86_64.rpm 
rpm -ivh mysql-community-libs-8.0.28-1.el7.x86_64.rpm 
（若有报错提示：mariadb-libs is obsoleted by mysql-community-libs-8.0.28-1.el7.x86_64 再执行该指令：rpm -e mariadb-libs --nodeps 之后重新安装报错的包）
rpm -ivh mysql-community-libs-8.0.28-1.el7.x86_64.rpm 
rpm -ivh mysql-community-libs-compat-8.0.28-1.el7.x86_64.rpm 
rpm -ivh  mysql-community-devel-8.0.28-1.el7.x86_64.rpm 
（若有报错提示：pkgconfig(openssl) is needed by mysql-community-devel-8.0.28-1.el7.x86_64 再执行该指令：yum install openssl-devel 之后重新安装报错的包）
rpm -ivh  mysql-community-devel-8.0.28-1.el7.x86_64.rpm 
rpm -ivh mysql-community-client-8.0.28-1.el7.x86_64.rpm 
rpm -ivh  mysql-community-server-8.0.28-1.el7.x86_64.rpm 
（若有报错提示：libaio.so.1()(64bit) is needed by mysql-community-server-8.0.28-1.el7.x86_64 再执行该指令：yum install libaio 之后重新安装报错的包）
rpm -ivh  mysql-community-server-8.0.28-1.el7.x86_64.rpm 
rpm -ivh  mysql-community-icu-data-files-8.0.28-1.el7.x86_64.rpm 

systemctl start mysqld

-- 查看MySQL运行状态
systemctl status mysqld.
-- 停止MySQL运行
systemctl stop mysqld
-- 重启MySQL
systemctl restart mysqld

cat /var/log/mysqld.log

mysql -uroot -p

ALTER  USER  'root'@'localhost'  IDENTIFIED BY 'xxxxxxxxxxx'

set global validate_password.policy = 0;

vim /etc/my.cnf

// 迁移数据目录
mv /var/lib/mysql /demo/mysql
// 赋予目录权限
chown -R mysql:mysql /demo/mysql
// 建立软连接
ln -s /demo/mysql /var/lib/
// 检查创建的软连接
ls -l /var/lib

mysql -uroot -p

use mysql;

select host, user, authentication_string, plugin from user; 

update user set host = '%' where user = 'root';

flush privileges;