環境準備

虛擬機器安裝CentOS

下載並安裝xshell、xftp

下載MySQL

安裝MySQL命令

檢視系統中有無MySQL

　　rpm -qa|grep mysql

檢視系統中有無mariadb

　　rpm -qa | grep mariadb

解除安裝mariadb

　　rpm -e --nodeps mariadb-libs-5.5.68-1.el7.x86_64

進入/usr/local/目錄

　　cd /usr/local/

檢視目錄下內容

　　ll

建立mysql目錄

　　mkdir mysql

進入mysql目錄

　　cd mysql

解壓mysql

　　tar -xvf mysql-8.0.26-1.el7.x86_64.rpm-bundle.tar

檢視目錄下內容

　　ll

mysql-8.0.26-1.el7.x86_64.rpm-bundle.tar
mysql-community-client-8.0.26-1.el7.x86_64.rpm
mysql-community-client-plugins-8.0.26-1.el7.x86_64.rpm
mysql-community-common-8.0.26-1.el7.x86_64.rpm
mysql-community-devel-8.0.26-1.el7.x86_64.rpm
mysql-community-embedded-compat-8.0.26-1.el7.x86_64.rpm
mysql
 
-community-libs-8.0.26-1.el7.x86_64.rpm
mysql-community-libs-compat-8.0.26-1.el7.x86_64.rpm
mysql-community-server-8.0.26-1.el7.x86_64.rpm
mysql-community-test-8.0.26-1.el7.x86_64.rpm

依次安裝

　　rpm -ivh mysql-community-common-8.0.26-1.el7.x86_64.rpm

　　rpm -ivh mysql-community-client-plugins-8.0.26-1.el7.x86_64.rpm

　　rpm -ivh mysql-community-libs-8.0.26-1.el7.x86_64.rpm

　　rpm -ivh mysql-community-libs-compat-8.0.26-1.el7.x86_64.rpm

　　rpm -ivh mysql-community-client-8.0.26-1.el7.x86_64.rpm

　　rpm -ivh mysql-community-server-8.0.26-1.el7.x86_64.rpm

安裝完成後要初始化資料庫

　　mysqld --initialize --console

　　chown -R mysql:mysql /var/lib/mysql/

啟動mysql

　　systemctl start mysqld

檢視初始密碼

　　cat /var/log/mysqld.log | grep password

登入進資料庫

　　mysql -u root -p

修改密碼

　　ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'root';

　　ALTER USER 'root'@'localhost' IDENTIFIED BY 'root' PASSWORD EXPIRE NEVER; 命令修改加密規則，MySql8.0 版本 和 5.0 的加密規則不一樣，而現在的視覺化工具只支援舊的加密方式。

通過以下命令，進行遠端訪問的授權

　　create user 'root'@'%' identified with mysql_native_password by 'root';

　　grant all privileges on *.* to 'root'@'%' with grant option;

　　命令重新整理修該後的許可權

　　　　flush privileges;

通過以下命令，關閉 firewall(防火牆）

　　systemctl stop firewalld.service;

　　systemctl disable firewalld.service;

　　systemctl mask firewalld.service;

退出 MySQL命令

　　exit;

　　快捷方式

　　　　CTRL+D