RaspberryPI 3 系统安装及常见问题的示例分析

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实际上我以为系统安装非常简单，当然事实上真的是非常简单，不过我在安装过程遇到一个无语的坑折腾了我小半天时间。（卖家赠送的SD卡质量不过关，raspberry无法识别）。

系统安装我无需再自己写，借用官网的，只是加一些关键解释。

https://www.raspberrypi.org/documentation/installation/installing-images/README.md

事先检查：将待用的SD卡推入raspberry插槽，观察指示灯状态。如果SD正确被识别可用，指示灯将有闪烁绿色灯光或红绿相间。（我用的SD卡在插入插槽后，指示灯一直保持红色，烧入的系统无法登录，当然实际是未识别卡）

This resource explains how to install a Raspberry Pi operating system image on an SD card. You will need another computer with an SD card reader to install the image.

We recommend most users download NOOBS, which is designed to be very easy to use. However, more advanced users looking to install a particular image should use this guide.

Download the image

Official images for recommended operating systems are available to download from the Raspberry Pi website Downloads page.

Alternative distributions are available from third-party vendors.

If you're not using Etcher (see below), you'll need to unzip .zip downloads to get the image file (.img) to write to your SD card.

Note: the Raspbian with PIXEL image contained in the ZIP archive is over 4GB in size and uses the ZIP64 format. To uncompress the archive, a unzip tool that supports ZIP64 is required. The following zip tools support ZIP64:

• 7-Zip (Windows)

• The Unarchiver (Mac)

• Unzip (Linux)

Writing an image to the SD card

You will need to use an image writing tool to install the image you have downloaded on your SD card.

Etcher is a graphical SD card writing tool that works on Mac OS, Linux and Windows, and is the easiest option for most users. Etcher also supports writing images directly from the zip file, without any unzipping required. To write your image with Etcher:

• Download Etcher and install it.

• Connect an SD card reader with the SD card inside.

• Open Etcher and select from your hard drive the Raspberry Pi .img or .zip file you wish to write to the SD card.

• Select the SD card you wish to write your image to.

• Review your selections and click 'Flash!' to begin writing data to the SD card.

社区里，有许多玩家也推荐了另一软小巧好用的软件：Win32DiskImager

系统写入SD成功后，在未通电状态下插入SD卡，连接显示器HDMI（如需要），网线（有线），然后接通电源。

当树莓派指示灯有红绿光闪烁时，说明系统应该是正常启动了。

如果有显示器的话，直接用pi/raspberry登录。

使用SSH登录的话，需要先登录到路由器的管理界面查看raspberrypi的IP。

有Linux使用经验的话，SSH连接应该非常清楚。

使用putty或openssh：

ssh pi@<pi's ip>

注意：新版的系统可能默认关闭了ssh连接，那么你需要将SD插回电脑，在U盘根目录创建一个名为ssh的空白文件即可，再次连接并启动raspberrypi将能够通过SSH登录系统。

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