July 2017
Intermediate to advanced
398 pages
11h 54m
Chinese
Content preview from Python数据处理
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376
｜
附录
G
G.2.1
得到实例的公共
DNS
名称
公共
DNS
名称是实例的
Web
地址。如果你有一个看起来像
Web
地址的值，继续阅
读下一个小节。如果值为“
--
”，那么你需要跟随下面这些额外的步骤（来自
Stack
Overflow
，
http://stackoverflow.com/questions/20941704/ec2-instance-has-no-public-
dns/26403671#26403671
）。
(1)
访问
console.aws.amazon.com
。
(2)
访问
Services
（顶部导航）
→
VPC
（接近列表的末尾）。
(3)
打开你的
VPC
（左侧栏目）。
(4)
选择连接到你的
EC2
的
VPC
。
(5)
在“
Actions
”下拉菜单，选择“
Edit DNS Hostnames
”。
(6)
修改“
Edit DNS Hostnames
”为“
Yes
”。
如果你返回
EC2
实例，应该看到它现在有了一个公共
DNS
名称。
G.2.2
准备你的私钥
你的私钥是一个下载的
.pem
文件。将它移动到一个你了解并且能够记住的文件夹是好的
想法。对于基于
Unix
的系统，你的密钥会保存在
home
目录下名为
.ssh
的文件夹。对于
Windows
，默认的位置是
C:\Documents and Settings\.ssh\
或
C:\Users\.ssh
。你需要复制你
的
.pem
文件到这些文件夹。
然后，你需要运行
chmod
命令来改变
.pem
文件的权限为
400
。修改权限为
400
意味着，文
件只能被所有者访问。这保证了在多账户计算机环境下文件的安全： ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.