When you select should choose which version centos mirror when [turn] buy Ali cloud cloud server

Method / Step
First of all, we need to know is the difference between each system, as well as in Ali cloud differences:
1. Windows
1.1) The system contains genuine activation.
1.2) is suitable for the development of the program running under Windows, such as .net and so on.
1.3) supports SQL Server and other databases (need to install it yourself).
1.4) You can use Remote Desktop to log management.
Note: The 512 does not support the selected memory Windows systems , 1G RAM or above can be a good support system.
2. Linux
2.1.1) of the most popular server operating system, strong security and stability.
2.1.2) is free and open source, easy to build and compile the source code .
2.1.3) by SSH to access remotely your cloud server .
2.1.4) are generally used for high-performance web server applications, etc., support the common PHP / Python and other programming languages , such as support for MySQL database (to be self-install).
2.2 CentOS (recommended) way to use yum to install the software online.
2.3 Ubuntu use aptitude to install the software online mode.
2.4 Debian use the apt-get installed software online.
2.5 Aliyun Linux (compatible with Red Hat) use the online mode yum install software, yum need to buy their own source of commercial support redhat.
OS replacement rules:
1. Replace the operating system
Please stop before changing the system cloud server , the cloud server to replace the operating system directly reset the system tray [unchanged] IP, system disk data will be lost!
Please note:
1.1. Replacing the operating system will make the cloud server system disk replaced with a new image, the original system disk data is lost.
1.2. Data cloud server data disk will not be affected.
1.3. We recommend that you personal system disk backup data to a data disk, or other means of backup.
1.4 Data backup system disk because you do not have the relevant personal data loss, Ali cloud is not liable.
1.5. Memory is 512M cloud server does not support replacing the Windows operating system .
2. CPU / memory and operating system of choice
2.1) To select / change more than 4G of memory you choose 64-bit operating system (32-bit operating system addressable limit exists).
2.2) If you choose 32-bit operating system, 4G or more memory pages temporarily show only the cloud server to replace 64-bit operating system before the show.
2.3) Windows 32-bit operating system supports up to four CPU cores.
2.4) Configuration: [CPU: 1 core; RAM: 512M] cloud server does not support selection / replacement of the Windows operating system.
Windows articles
Ali cloud offers six window system that covers Server 2003 sp2 and Server 2008 R2 operating system in these two categories.
Which is divided into the 32-bit and 64-bit
(1) how to select the 32-bit or 64-bit
32-bit 64-bit system compared to a system, embodied in the most important limitation of memory size. Because the 32-bit limit itself, its maximum only support up to 4GB of memory, if your site is to be used later than 4GB of memory or have hopes of finding more than 4GB of memory expansion plan to use 64-bit operating system.
(2) Select 2003 or 2008 selection
For windows, I personally recommend is to choose the higher version better. Relatively new version of vulnerability is relatively less, relative to IIS6 and IIS 7.5 provides more features and more convenient console. But considering all of the different machine configurations, this gives it several options:
A: Configuring below binuclear 2GB memory: select database is not installed server2003 dual-core 4GB: server 2003 mssql or without database server 2008 R2
B: configuration than a dual-core 8GB: serever 2008 R2 mssql recommend if you want to run on the cloud server database, try to choose a large memory configurations, or to reduce the configuration selected RDS
(3) in English, how to choose the version of security reinforcement
The people on the basis of their own preferences, and not much to say in this regard Windows server configuration tutorial, because a lot of online tutorials and Windows configuration less difficult, so Windows configuration tutorial relatively late release of Linux is relative.
Linux articles
(1) What is the difference of these categories linux
Debian: a deb package using APT package management systems.
Meanwhile Debian provides a relatively new version of most software and offers more package (relative to the original Red Hat). Debian update advantage is that rapid, complete package (Ubuntu in particular), and convenient operation. The disadvantage is the poor stability of part time to follow up on the latest software may exist Bug.
Centos: use rpm package, use the yum package management systems.
Debian is relative, Centost a major feature is slow. Most stay in the stable version of the software, and the latest version is also poor apart more. And some new features to support some of the new version of the software is relatively slow, such as php-fpm.
Because Centos operating system for business users, it is very prominent in the stability, generally prefer the latter in the choice of new features or stability. Only when a stable function completely determined, and will be added to the system. The advantage is system stability, improve the technical documentation, if paid, then get enterprise-level technical support. The disadvantage is that the package is relatively old, and some of the newer features will be lacking.
To sum up: If you like the early adopters, like to use the latest features like tossing or system, so Debian is a better choice.
Difficult to get started Ubunt <Debian <Redhat = Centos
(2) Debian selection with Ubuntu
Ubuntu is developed based on Debian, you can simply think Ubuntu is Debian enhanced functionality.
Compared with Debian, Ubuntu provides a more user-friendly system configuration, more powerful operating system and more radical than the Debian software updates.
Ubuntu and Debian comparison, tend to be considered more conservative Debian, Ubuntu higher degree novice-friendly, easier to get started.
Ubuntu is used will appreciate its ease of use, whereas if used Ubuntu and back to the other systems, will feel right, Ubuntu is really easy.
Personal advice, if you intend to choose Debian class, recommended to choose Ubuntu.
Ubuntu provides a better operation, more aggressive software updates, easier management software, and stability is almost the same.
If you do not want to give up the stable, then please select Debian.
About Ubuntu version of choice:
In this interpretation Ubuntu versions support time. Ubuntu ordinary version provides only 18 months of technical support, regardless of date.
Server version provides up to five years of technical support. It is recommended that you select the version 12.04, providing up to 5 years of technical support, we can ensure that your server can continue to receive patches and upgrade software source is available in the wait for a long period of time.
(3) Centos selection
For Ali cloud Centos choice, we recommended to choose Centos 6.5 version brings more new features and more new features.
Unless you need php 5.1 software environment, then select Centos6.5. If a site needs to support php5.1, only use Centos 5.8.
As for the specific version selected, we recommend php 5.1 users choose Centos 5.8, other users, compared with Centos 6.5.
See the full details: https://cnblogs.com/qianzf/
 original blog link address: https://cnblogs.com/qzf/