到官网下载最新的的安装包：

[root@study data]# wget https://dev.mysql.com/get/Downloads/MySQL-8.0/mysql-8.0.13-1.el7.x86_64.rpm-bundle.tar

卸载CentOS7自带的MariaDB依赖：

[root@study selinux]# rpm -qa|grep mariadb
mariadb-libs-5.5.60-1.el7_5.x86_64
[root@study selinux]# rpm -e --nodeps mariadb-libs
[root@study selinux]# rpm -qa|grep mariadb

解压下载的安装包

[root@study data]# tar -xvf mysql-8.0.13-1.el7.x86_64.rpm-bundle.tar

安装net-tools

[root@study data]# yum -y install net-tools

依次安装mysql包

[root@study data]# rpm -ivh mysql-community-common-8.0.13-1.el7.x86_64.rpm
[root@study data]# rpm -ivh mysql-community-libs*
[root@study data]# rpm -ivh mysql-community-client-8.0.13-1.el7.x86_64.rpm
[root@study data]# rpm -ivh  mysql-community-server-8.0.13-1.el7.x86_64.rpm
warning: mysql-community-server-8.0.13-1.el7.x86_64.rpm: Header V3 DSA/SHA1 Signature, key ID 5072e1f5: NOKEY
error: Failed dependencies:
  /usr/bin/perl is needed by mysql-community-server-8.0.13-1.el7.x86_64
  perl(Getopt::Long) is needed by mysql-community-server-8.0.13-1.el7.x86_64
  perl(strict) is needed by mysql-community-server-8.0.13-1.el7.x86_64
### 安装缺失的perl依赖包
[root@study data]# yum install perl
[root@study data]# rpm -ivh  mysql-community-server-8.0.13-1.el7.x86_64.rpm

启动mysql，获取默认root密码,登录mysql数据库

[root@study data]# systemctl start mysqld.service
[root@study data]# grep 'temporary password' /var/log/mysqld.log
2018-11-16T15:15:20.149816Z 5 [Note] [MY-010454] [Server] A temporary password is generated for root@localhost: J/V3,F-pa;>X
[root@study data]# mysql -uroot -p

初始化mysql

[root@study data]# mysql_secure_installation

Securing the MySQL server deployment.

Enter password for user root: 
The 'validate_password' component is installed on the server.
The subsequent steps will run with the existing configuration
of the component.
Using existing password for root.

Estimated strength of the password: 100 
Change the password for root ? ((Press y|Y for Yes, any other key for No) : y

New password: $RFV5tgb

Re-enter new password: $RFV5tgb

Estimated strength of the password: 100 
Do you wish to continue with the password provided?(Press y|Y for Yes, any other key for No) : y
By default, a MySQL installation has an anonymous user,
allowing anyone to log into MySQL without having to have
a user account created for them. This is intended only for
testing, and to make the installation go a bit smoother.
You should remove them before moving into a production
environment.

Remove anonymous users? (Press y|Y for Yes, any other key for No) : y
Success.


Normally, root should only be allowed to connect from
'localhost'. This ensures that someone cannot guess at
the root password from the network.

Disallow root login remotely? (Press y|Y for Yes, any other key for No) : y
Success.

By default, MySQL comes with a database named 'test' that
anyone can access. This is also intended only for testing,
and should be removed before moving into a production
environment.


Remove test database and access to it? (Press y|Y for Yes, any other key for No) : y
- Dropping test database...
Success.

- Removing privileges on test database...
Success.

Reloading the privilege tables will ensure that all changes
made so far will take effect immediately.

Reload privilege tables now? (Press y|Y for Yes, any other key for No) : y
Success.

All done!

修改root密码，新建study用户

### 初始化时已更改root密码，这里可以省略
# mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY '$RFV5tgb';
### 这里是避免SQLyog连接8.0报：Error No.2058 Plugin caching_sha2_password could not be loaded，后续工具更新后，再使用8.0新的加密方式
mysql> CREATE USER 'study'@'localhost' IDENTIFIED WITH mysql_native_password BY '^YHN7ujm';
### 授予study所有权限
mysql> GRANT ALL PRIVILEGES ON *.* TO 'study'@'localhost' WITH GRANT OPTION;

用SQLyog进行连接

ps: 由于mysql没有开启远程连接，通过ssh连接跳转

1. 配置SSH Tunneling

配置ssh

2. 填写mysql连接信息，注意host填：127.0.0.1

配置mysql连接