CentOS-6.9-x86_64-bin-DVD1.iso

http://archive.kernel.org/centos-vault/6.9/isos/x86_64/CentOS-6.9-x86_64-bin-DVD1.iso

CentOS-6.8-x86_64-bin-DVD1.iso

http://archive.kernel.org/centos-vault/6.8/isos/x86_64/CentOS-6.8-x86_64-bin-DVD1.iso

CentOS-6.7-x86_64-bin-DVD1.iso

http://archive.kernel.org/centos-vault/6.7/isos/x86_64/CentOS-6.7-x86_64-bin-DVD1.iso

CentOS-6.6-x86_64-bin-DVD1.iso

http://archive.kernel.org/centos-vault/6.6/isos/x86_64/CentOS-6.6-x86_64-bin-DVD1.iso

CentOS-6.5-x86_64-bin-DVD1.iso

http://archive.kernel.org/centos-vault/6.5/isos/x86_64/CentOS-6.5-x86_64-bin-DVD1.iso

CentOS-6.4-x86_64-bin-DVD1.iso

http://archive.kernel.org/centos-vault/6.4/isos/x86_64/CentOS-6.4-x86_64-bin-DVD1.iso

CentOS-6.3-x86_64-bin-DVD1.iso

http://archive.kernel.org/centos-vault/6.3/isos/x86_64/CentOS-6.3-x86_64-bin-DVD1.iso

CentOS-6.2-x86_64-bin-DVD1.iso

http://archive.kernel.org/centos-vault/6.2/isos/x86_64/CentOS-6.2-x86_64-bin-DVD1.iso

CentOS-6.1-x86_64-bin-DVD1.iso

http://archive.kernel.org/centos-vault/6.1/isos/x86_64/CentOS-6.1-x86_64-bin-DVD1.iso

CentOS-6.0-x86_64-bin-DVD1.iso

http://archive.kernel.org/centos-vault/6.0/isos/x86_64/CentOS-6.0-x86_64-bin-DVD1.iso

CentOS-5.9-x86_64-bin-DVD-1of2.iso

http://archive.kernel.org/centos-vault/5.9/isos/x86_64/CentOS-5.9-x86_64-bin-DVD-1of2.iso

CentOS-5.8-x86_64-bin-DVD-1of2.iso

http://archive.kernel.org/centos-vault/5.8/isos/x86_64/CentOS-5.8-x86_64-bin-DVD-1of2.iso

CentOS版本官网下载：http://archive.kernel.org/centos-vault/

http://mirrors.cqu.edu.cn/CentOS/

Ubuntu版本的官网下载：http://mirrors.melbourne.co.uk/ubuntu-releases/

http://releases.ubuntu.com/

OpenSUSE版本的官网下载：https://download.opensuse.org/distribution/leap/

官网：https://www.linux.org/pages/download/

下载选择示例：

1、进入官网下载地址

2、选择要下载的版本

3、

4、

5、

各个版本的区别，参考文章：

https://blog.csdn.net/zl_StepByStep/article/details/77982553