下载
访问MySQL的下载地址：https://dev.mysql.com/downloads/mysql/
选择系统、版本、glic版本后，下载包缩包
https://cdn.mysql.com//Downloads/MySQL-8.0/mysql-8.0.39-linux-glibc2.17-x86_64.tar.xz
注：如果不知道该选什么glic版本，可以运行命令：
ldd --version
输出：
ldd (GNU libc) 2.17
Copyright (C) 2012 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
Written by Roland McGrath and Ulrich Drepper.
表示该机的glic版本是：2.17
解压及启动前的准备
- 准备好目录：/app_home/, 压缩包在此目录下：/app_home/mysql-8.0.39-linux-glibc2.17-x86_64.tar.xz
- 解压xz:
xz -d mysql-8.0.39-linux-glibc2.17-x86_64.tar.xz - 解压tar:
tar -xvf mysql-8.0.39-linux-glibc2.17-x86_64.tar - rename:
mv mysql-8.0.39-linux-glibc2.17-x86_64 mysql-8.0.39 - 创建data目前：
cd /app_home/mysql-8.0.39/mkdir ./data