用centos8的主机困惑了一天没有成功。后改为centos7做成功
具体步骤：
1下载安装包：
解压，设置软连接（因为名字太长）
创建用户修改属主和属组
useradd -r -g mysql -u 306 -d /data/mysql/ mysql
[root06:42 PMcentos8/usr/local/mysql/support-files]#cat /etc/my.cnf
[mysqld]
datadir=/data/mysql
【在相对路径下执行，不能在绝对路径】
[root06:34 PMcentos8/usr/local/mysql]#./scripts/mysql_install_db --datadir=/data/mysql/ --user=mysql 定义安装的数据库的目录和属主
启动脚本：
[root06:35 PMcentos8/usr/local/mysql/support-files]#./mysql.server start
Starting MySQL.Logging to'/data/mysql/centos8.magedu.com.err'.
SUCCESS!
[root06:56 PMcentos8/usr/local/mysql/support-files]#ss -tnl |grep 3306
LISTEN 0 80 *:3306 *:*
yuminstall libncurses*
yum install libaio* -y
【在相对路径下执行，不能在绝对路径】
[root06:34 PMcentos8/usr/local/mysql]#./scripts/mysql_install_db --datadir=/data/mysql/ --user=mysql 定义安装的数据库的目录和属主
启动脚本：
[root06:35 PMcentos8/usr/local/mysql/support-files]#./mysql.server start
Starting MySQL.Logging to'/data/mysql/centos8.magedu.com.err'.
SUCCESS!
[root06:56 PMcentos8/usr/local/mysql/support-files]#ss -tnl |grep 3306
LISTEN 0 80 *:3306 *:*
yuminstall libncurses*
yum install libaio* -y
【在相对路径下执行，不能在绝对路径】
[root06:34 PMcentos8/usr/local/mysql]#./scripts/mysql_install_db --datadir=/data/mysql/ --user=mysql 定义安装的数据库的目录和属主
启动脚本：
[root06:35 PMcentos8/usr/local/mysql/support-files]#./mysql.server start
Starting MySQL.Logging to'/data/mysql/centos8.magedu.com.err'.
SUCCESS!
[root06:56 PMcentos8/usr/local/mysql/support-files]#ss -tnl |grep 3306
LISTEN 0 80 *:3306 *:*
yuminstall libncurses*
yum install libaio* -y
【在相对路径下执行，不能在绝对路径】
[root06:34 PMcentos8/usr/local/mysql]#./scripts/mysql_install_db --datadir=/data/mysql/ --user=mysql 定义安装的数据库的目录和属主
启动脚本：
[root06:35 PMcentos8/usr/local/mysql/support-files]#./mysql.server start
Starting MySQL.Logging to'/data/mysql/centos8.magedu.com.err'.
SUCCESS!
[root06:56 PMcentos8/usr/local/mysql/support-files]#ss -tnl |grep 3306
LISTEN 0 80 *:3306 *:*
yuminstall libncurses*
yum install libaio* -y
