1.我的环境

2.添加在线Mysql源

 cd /etc/yum.repos.d/

# Enable to use MySQL 8.0
[mysql80-community]
name=MySQL 8.0 Community Server
baseurl=http://repo.mysql.com/yum/mysql-8.0-community/el/6/x86_64/
enabled=1
gpgcheck=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql

3.验证

yum repolist enabled | grep mysql

如果想设置mysql数据库表名不区分大小写，一定要现在vi /etc/my.cnf 修改：

因为一旦数据库初始化完以后，该参数就无法修改了。

MySQL官方文档发现

lower_case_table_names can only be configured when initializing the server. Changing the lower_case_table_names setting after the server is initialized is prohibited.

4.YUM安装mysql 

yum install -y mysql-community-common mysql-community-libs mysql-community-client mysql-community-server mysql-community-devel

启动Mysql服务  
service mysqld start

查看MySQL服务器的状态 
service mysqld status

设置开机启动  
chkconfig mysqld on

生成随机密码 
grep 'temporary password' /var/log/mysqld.log

重新登陆 
mysql -uroot -p  
b/xE8hdZoEwJ

配置Mysql 密码以及权限

ALTER USER 'root'@'localhost' IDENTIFIED BY 'Report@123';

允许root用户在任何地方进行远程登录，并具有所有库任何操作权限

GRANT ALL PRIVILEGES ON *.* TO 'root'@'%';

FLUSH PRIVILEGES;

疑难解答：

GPG key retrieval failed: [Errno 14] Could not open/read file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-6

第一种是把这个key从这个源站copy过来，放到/etc/pki/rpm-gpg目录下

第二种是修改repo文件

vim /etc/yum.repos.d/epel.repo
[epel]
name=Extra Packages for Enterprise Linux 6 – $basearch
#baseurl=http://download.fedoraproject.org/pub/epel/6/$basearch
mirrorlist=https://mirrors.fedoraproject.org/metalink?repo=epel-6&arch=$basearch
failovermethod=priority
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-6

把gpgcheck=1改为gpgcheck=0

ERROR 2059 (HY000): Authentication plugin 'caching_sha2_password' cannot be loaded

ALTER USER 'root'@'%' IDENTIFIED WITH mysql_native_password BY 'WangJian2018@vtobank.com'