Mysql5.7 

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# cd /etc/yum.repos.d/

# 新增编辑一个yum源
# vim mysql.repo

内容： 

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[mysql57-community]
name=MySQL 5.7 Community Server
## baseurl=http://repo.mysql.com/yum/mysql-5.7-community/el/6/$basearch/   
baseurl=http://repo.mysql.com/yum/mysql-5.7-community/el/7/$basearch/
enabled=1
gpgcheck=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql


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

# 启动/停止Mysql (和service mysqld start 效果一样)
# /bin/systemctl start mysqld.service

# /bin/systemctl stop mysqld.service

启动后：

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# 查看首次启动的随机密码
# grep 'temporary password' /var/log/mysqld.log

#进入mysql
# mysql -uroot -pxxx

# 修改密码(5.7版本以上必须要有大小写特殊字符)
# ALTER USER 'root'@'localhost' IDENTIFIED BY '12345678@Abc';

# 授权远程登录Mysql
# GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY '12345678@Abc' WITH GRANT OPTION;

Mysql8.0

mysql8.0安装有点ZZ，研究一下先

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create user cc@'%' identified by '12345678@Abc';

GRANT ALL ON *.* TO 'cc'@'%' WITH GRANT OPTION;

ALTER USER 'root'@'%' IDENTIFIED BY '12345678@Abc';

GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY '12345678@Abc' WITH GRANT OPTION;