Centos7 安装 Mysql8教程

###在CentOS 7 / RHEL 7系统上### 
rpm -Uvh https://repo.mysql.com/mysql80-community-release-el7-3.noarch.rpm

###在CentOS 7 / RHEL 6系统上### 
rpm -Uvh https://repo.mysql.com/mysql80-community-release-el6-3.noarch.rpm

###在Fedora 30系统上### 
rpm -Uvh https://repo.mysql.com/mysql80-community-release-fc30-1.noarch.rpm

###在Fedora 29系统上### 
rpm -Uvh https://repo.mysql.com/mysql80-community-release-fc29-2.noarch.rpm

###在Fedora 28系统上### 
rpm -Uvh https://repo.mysql.com/mysql80-community-release-fc28-2.noarch.rpm

sed -i 's/enabled=1/enabled=0/' /etc/yum.repos.d/mysql-community.repo

## CentOS & RedHat 版本
yum --enablerepo=mysql80-community install mysql-community-server
## Fedora Systems 版本
dnf --enablerepo=mysql80-community install mysql-community-server

service mysqld start

systemctl start mysqld.service

grep "A temporary password" /var/log/mysqld.log

mysql_secure_installation

Enter password for user root:

The existing password for the user account root has expired. Please set a new password.

New password:
Re-enter new password:

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

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

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

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

### Using Systemd
systemctl enable mysqld.service
systemctl restart mysqld.service

systemctl enable iptables
systemctl start iptables
vim /etc/sysconfig/iptables
##规则中加入
-A INPUT -p tcp -m state --state NEW -m tcp --dport 3306 -j ACCEPT
##重启防火墙
systemctl enable iptables.service
systemctl start iptables.service

mysql -u username -p

systemctl start mysqld.service

systemctl stop mysqld.service

systemctl restart mysqld.service

systemctl enable mysqld.service