如何在Ubuntu中安装apache2

我正试图在Ubuntu12中安装apache2。我在虚拟机中安装了Ubuntu。我有问题。首先，我的系统无法更新或升级。当我打字时：

我收到很多这样的错误：

Err http://security.ubuntu.com quantal-security/main Sources
  404  Not Found [IP: 91.189.91.14 80]

在最后一行，这是结果：

W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/quantal-backports/multiverse/binary-i386/Packages  404  Not Found [IP: 91.189.91.13 80]

E: Some index files failed to download. They have been ignored, or old ones used instead.

第二，当我尝试安装apache2时。I类型：

sudo apt-get install apache2 apache2-doc apache2-utils

同样，它失败了。结果是：

W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/quantal-backports/multiverse/binary-i386/Packages  404  Not Found [IP: 91.189.91.13 80]

E: Some index files failed to download. They have been ignored, or old ones used instead.

e@ubuntu：/etc$sudo apt get安装apache2 apache2 doc apache2 utils 正在阅读软件包列表。。。多恩 构建依赖关系树
正在读取状态信息。。。多恩 E:找不到包apache2 E:找不到包apache2文档 E:找不到包apache2 utils e@ubuntu：/etc$

你能帮我吗

编辑： 这个命令也不起作用

sudo apt-get update && sudo apt-get upgrade

我得到：

W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/quantal-backports/multiverse/binary-i386/Packages  404  Not Found [IP: 91.189.91.24 80]

E: Some index files failed to download. They have been ignored, or old ones used instead.

---

问题在于操作系统的安装。 使用

sudo-apt-get-update&&sudo-apt-get-upgrade

。如果您无法更新。然后尝试重新安装操作系统。 重新安装操作系统后，请尝试

sudo apt get install apache2 apache2 doc apache2 utils