Ubuntu18.04更换阿里云镜像源文件解决系统无法升级问题

一般我们拿到一台服务器之后第一件事情就应该update升级系统软件库，但是有些时候由于各种的问题，一般是海外主机商会存在这些问题。今天老蒋有遇到这家海外主机商，我在服务器中默认安装的是Ubuntu18.04系统，直接update的时候有出现错误。

root@laobuluo:~# apt-get update -y
Ign:1 http://us.archive.ubuntu.com/ubuntu zesty InRelease
Ign:2 http://us.archive.ubuntu.com/ubuntu zesty-updates InRelease
Ign:3 http://us.archive.ubuntu.com/ubuntu zesty-backports InRelease
Err:4 http://us.archive.ubuntu.com/ubuntu zesty Release
404 Not Found [IP: 91.189.91.14 80] Err:5 http://us.archive.ubuntu.com/ubuntu zesty-updates Release
404 Not Found [IP: 91.189.91.14 80] Err:6 http://us.archive.ubuntu.com/ubuntu zesty-backports Release
404 Not Found [IP: 91.189.91.14 80] Ign:7 http://security.ubuntu.com/ubuntu zesty-security InRelease
Err:8 http://security.ubuntu.com/ubuntu zesty-security Release
404 Not Found [IP: 91.189.88.174 80] Reading package lists... Done
E: The repository 'http://us.archive.ubuntu.com/ubuntu zesty Release' does no longer have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: The repository 'http://us.archive.ubuntu.com/ubuntu zesty-updates Release' does no longer have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.

一般我们用国内主机商是没有这些问题的，应该内置的源是我们国内的。所以这里老 蒋更换阿里云国内的镜像源。

/etc/apt/sources.list

我们可以直接vim编辑文件或者是下载到本地编辑。

将内容替换成：

deb http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse

替换之后，我们再执行命令：

apt-get update -y

apt-get upgrade -y

然后我们可以看到没有任何报错。

就这样Ubuntu18.04系统更换源升级软件包是没有问题的，Ubuntu 17.04等版本也是可以使用的。我们如果不放心可以先将系统源文件sources.list备份一份，然后再替换升级，有问题还可以及时恢复。

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