AWS / Ubuntu存档服务器似乎已关闭？

我对AWS和Nginx（OSS版本）都是全新的。我刚刚创建了免费（微型t2）EC2 Ubuntu实例，并尝试在其上安装nginx。所以我先运行sudo apt-get upgrade然后sudo apt-get install nginx得到以下错误：

Get:1 http://us-west-2.ec2.archive.ubuntu.com/ubuntu/ trusty/main fonts-dejavu-core all 2.34-1ubuntu1 [1,024 kB]
Get:2 http://us-west-2.ec2.archive.ubuntu.com/ubuntu/ trusty-updates/main fontconfig-config all 2.11.0-0ubuntu4.1 [47.4 kB]
Get:3 http://us-west-2.ec2.archive.ubuntu.com/ubuntu/ trusty-updates/main libfontconfig1 amd64 2.11.0-0ubuntu4.1 [123 kB]
Get:4 http://us-west-2.ec2.archive.ubuntu.com/ubuntu/ trusty/main libjpeg-turbo8 amd64 1.3.0-0ubuntu2 [104 kB]
Get:5 http://us-west-2.ec2.archive.ubuntu.com/ubuntu/ trusty/main libjpeg8 amd64 8c-2ubuntu8 [2,194 B]
Get:6 http://us-west-2.ec2.archive.ubuntu.com/ubuntu/ trusty-updates/main libjbig0 amd64 2.0-2ubuntu4.1 [26.1 kB]
Get:7 http://us-west-2.ec2.archive.ubuntu.com/ubuntu/ trusty-updates/main libtiff5 amd64 4.0.3-7ubuntu0.3 [143 kB]
Get:8 http://us-west-2.ec2.archive.ubuntu.com/ubuntu/ trusty/main libvpx1 amd64 1.3.0-2 [556 kB]
Get:9 http://us-west-2.ec2.archive.ubuntu.com/ubuntu/ trusty/main libxpm4 amd64 1:3.5.10-1 [38.3 kB]
Get:10 http://us-west-2.ec2.archive.ubuntu.com/ubuntu/ trusty/main libgd3 amd64 2.1.0-3 [147 kB]
Get:11 http://us-west-2.ec2.archive.ubuntu.com/ubuntu/ trusty/main libxslt1.1 amd64 1.1.28-2build1 [145 kB]
Err http://us-west-2.ec2.archive.ubuntu.com/ubuntu/ trusty-updates/main nginx-common all 1.4.6-1ubuntu3.3
    404  Not Found [IP: <someIp> 80]
Err http://us-west-2.ec2.archive.ubuntu.com/ubuntu/ trusty-updates/main nginx-core amd64 1.4.6-1ubuntu3.3
    404  Not Found [IP: <someIp> 80]
Err http://us-west-2.ec2.archive.ubuntu.com/ubuntu/ trusty-updates/main nginx all 1.4.6-1ubuntu3.3
    404  Not Found [IP: <someIp> 80]
Fetched 2,356 kB in 1s (1,871 kB/s)
E: Failed to fetch http://us-west-2.ec2.archive.ubuntu.com/ubuntu/pool/main/n/nginx/nginx-common_1.4.6-1ubuntu3.3_all.deb  404  Not Found [IP: <someIp> 80]

E: Failed to fetch http://us-west-2.ec2.archive.ubuntu.com/ubuntu/pool/main/n/nginx/nginx-core_1.4.6-1ubuntu3.3_amd64.deb  404  Not Found [IP: <someIp> 80]

E: Failed to fetch http://us-west-2.ec2.archive.ubuntu.com/ubuntu/pool/main/n/nginx/nginx_1.4.6-1ubuntu3.3_all.deb  404 Not Found [IP: <someIp> 80]

实际上，它<someIp>是一个实际的IP地址，但是我不确定这是我的IP地址还是某个AWS / Ubuntu存档服务器。如果不是我的IP，我可以提供它，只要有人可以向我解释它是什么，甚至可以引用参考。

我无法确定这是AWS错误还是AWS配置错误（也许我需要调整一些防火墙设置等），nginx错误或的问题apt-get。有任何想法吗？