首先以root身份登录到Linux系统中，然后执行如下命令创建mysql用户账号：
#<==创建mysql用户。
[root@xkf ~]# useradd mysql -s /sbin/nologin -M
[root@xkf opt]# rz -E
rz waiting to receive.
[root@xkf opt]# ls
mysql-8.0.28-linux-glibc2.12-x86_64.tar.xz
[root@xkf opt]# tar xf mysql-8.0.28-linux-glibc2.12-x86_64.tar.xz
[root@xkf opt]# ls
mysql-8.0.28-linux-glibc2.12-x86_64 mysql-8.0.28-linux-glibc2.12-x86_64.tar.xz
[root@xkf opt]# mv mysql-8.0.28-linux-glibc2.12-x86_64 /usr/local/mysql
#1)增加简易配置文件，后面在优化
[root@xkf opt]# cat>/etc/my.cnf<<'EOF'
> [mysqld]
> user=mysql
> basedir=/usr/local/mysql
> datadir=/data/3306/data
> port=3306
> socket=/tmp/mysql.sock
> [client]
> socket=/tmp/mysql.sock
> EOF
[root@xkf opt]# chown mysql.mysql /etc/my.cnf
#2)创建MySQL数据目录并授权
[root@xkf opt]# mkdir -p /data/3306/data
[root@xkf opt]# chown -R mysql.mysql /data
[root@xkf opt]# ls -ld /data
drwxr-xr-x. 3 mysql mysql 18 Mar 22 16:21 /data
[root@xkf opt]# cd
3）配置PATH环境变量，并初始化MySQL数据库
#1) 配置PATH环境变量
[root@xkf ~]# echo 'export PATH=/usr/local/mysql/bin:$PATH' >>/etc/profile
[root@xkf ~]# . /etc/profile
[root@xkf ~]# echo $PATH
/usr/local/mysql/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/root/bin:/usr/java/jdk1.8.0_331-amd64/bin
#2)初始化MySQL数据库
[root@xkf ~]# /usr/local/mysql/bin/mysqld --initialize-insecure --user=mysql \
> --basedir=/usr/local/mysql --datadir=/data/3306/data
#1.设置MySQL启动脚本
[root@xkf ~]# cd /usr/local/mysql/support-files/
[root@xkf support-files]# cp mysql.server /etc/init.d/mysqld
[root@xkf support-files]# systemctl enable mysqld
mysqld.service is not a native service, redirecting to /sbin/chkconfig.
Executing /sbin/chkconfig mysqld on
#2.启动MySQL数据库
[root@xkf support-files]# systemctl start mysqld
#3.检查MySQL数据库是否启动。
[root@xkf support-files]# netstat -lntup|grep 330
tcp6 0 0 :::33060 :::* LISTEN 10904/mysqld
tcp6 0 0 :::3306 :::* LISTEN 10904/mysqld
[root@xkf ~]# mysql
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 9
Server version: 8.0.28 MySQL Community Server - GPL
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Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
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