安裝環境：
系統：Cento7.4
Mysql版本：8.0.11
Mysql遠端連線工具：Navicat

一 建立Mysql賬戶

    groupadd mysql
    useradd -g mysql mysql

二 準備安裝包

    mysql-community-common-8.0.11-1.el7.x86_64.rpm 
    mysql-community-libs-8.0.11-1.el7.x86_64.rpm
    mysql-community-client-8.0.11-1.el7.x86_64.rpm 
    mysql-community-server-8.0
 
.11-1.el7.x86_64.rpm

三 安裝Mysql

    安裝之前需要檢測系統是否有安裝mysql
    rpm -qa | grep mysql 
    rpm -qa | grep mariadb
    如果有使用命令進行解除安裝
    rpm -e --nodeps XXX
    解除安裝完成之後按照下列順序進行安裝
    rpm -ivh mysql-community-common-8.0.11-1.el7.x86_64.rpm
    rpm -ivh mysql-community-libs-8.0.11-1.el7.x86_64.rpm 
    rpm -ivh
 
 mysql-community-client-8.0.11-1.el7.x86_64.rpm 
    rpm -ivh mysql-community-server-8.0.11-1.el7.x86_64.rpm

報錯1
error: Failed dependencies: /usr/bin/perl is needed by
mysql-community-server-8.0.11-1.el7.x86_64 perl(Getopt::Long) is
needed by mysql-community-server-8.0.11-1.el7.x86_64 perl(strict)

解決1
yum install perl

四 初始mysqld –initialize啟動資料庫

    systemctl  start  mysqld

六 檢視初始化密碼

    vim /var/log/mysqld.log
    ;%WTMdmz0b#a

七 連結Mysql

    mysql -uroot -p
    密碼為上一步找到的初始化密碼

八 重置密碼

    ALTER USER 'root'@'localhost' IDENTIFIED BY 'a123456';

九 開啟遠端連線許可權

    CREATE USER 'admin'@'%' IDENTIFIED BY 'a123456';
    grant all on *.* to 'admin'@'%';
    flush PRIVILEGES; 

十 連線報錯

    因為mysql8.0改變了加密方式，使用下面的命令即可解決問題
    ALTER USER 'admin'@'%' IDENTIFIED BY 'a123456' PASSWORD EXPIRE NEVER;
    ALTER USER 'admin'@'%' IDENTIFIED WITH mysql_native_password BY 'a123456'; 
    FLUSH PRIVILEGES;