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[#]: collector: (lujun9972)
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[#]: translator: (geekpi)
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[#]: reviewer: ( )
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[#]: publisher: ( )
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[#]: url: ( )
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[#]: subject: (PiShrink – Make Raspberry Pi Images Smaller)
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[#]: via: (https://www.ostechnix.com/pishrink-make-raspberry-pi-images-smaller/)
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[#]: author: (sk https://www.ostechnix.com/author/sk/)
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PiShrink – Make Raspberry Pi Images Smaller
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======
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![Make Raspberry Pi Images Smaller With PiShrink In Linux][1]
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**Raspberry Pi** requires no introduction. It is a small, affordable and credit-card sized computer that can be connected to a Monitor or TV. We can attach a standard keyboard and mouse and use it as a full-blown desktop computer to do everyday tasks, such Internet browsing, playing videos/games, word processing and spreadsheet making and a lot more. It has been mainly developed for teaching Computer science in schools. Nowadays, Raspberry Pi is widely being used in colleges, small-medium organizations and institutes to teach coding. If you own a Raspberry Pi device, you might want to check out a bash script named **“PiShrink”** , which is used to make Raspberry Pi Images smaller. PiShrink will automatically shrink a pi image that will then resize to the max size of the SD card on boot. This will make putting the image back onto the SD card faster and the shrunk images will compress better. This can be useful to fit the large size images in your SD card. In this brief guide, we are going to learn to shrink Raspberry images to smaller size in Unix-like systems.
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### Installing PiShrink
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To install PiShrink on your Linux box, first download the latest version using command:
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```
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$ wget https://raw.githubusercontent.com/Drewsif/PiShrink/master/pishrink.sh
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```
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Next, make the downloaded PiShrink binary as executable:
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```
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$ chmod +x pishrink.sh
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```
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Finally, move it your path:
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```
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$ sudo mv pishrink.sh /usr/local/bin/
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```
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### Make Raspberry Pi Images Smaller
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As you may already know, **Raspbian** is the official operating system for all models of Raspberry Pi. The Raspberry foundation has developed **Raspberry Pi Desktop** version for PC and Mac. You can create a live cd, run it in virtual machine and even install it in your desktop as well. There are also few unofficial OS images available for Raspberry Pi. For the purpose of testing, I’ve downloaded the official Raspbian OS from the [**official download page**][2].
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Unzip the downloaded OS image:
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```
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$ unzip 2019-04-08-raspbian-stretch-lite.zip
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```
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The above command will extract contents of **2019-04-08-raspbian-stretch-lite.zip** file in the current working directory.
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Let check the actual size of the extracted file:
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```
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$ du -h 2019-04-08-raspbian-stretch-lite.img
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1.7G 2019-04-08-raspbian-stretch-lite.img
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```
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As you can see, the size of the extracted Raspberry OS img file is **1.7G**.
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Now, shrink this file’s size using PiShrink like below:
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```
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$ sudo pishrink.sh 2019-04-08-raspbian-stretch-lite.img
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```
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Sample output:
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```
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Creating new /etc/rc.local
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rootfs: 39795/107072 files (0.1% non-contiguous), 239386/428032 blocks
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resize2fs 1.45.0 (6-Mar-2019)
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resize2fs 1.45.0 (6-Mar-2019)
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Resizing the filesystem on /dev/loop1 to 280763 (4k) blocks.
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Begin pass 3 (max = 14)
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Scanning inode table XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
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Begin pass 4 (max = 3728)
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Updating inode references XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
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The filesystem on /dev/loop1 is now 280763 (4k) blocks long.
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Shrunk 2019-04-08-raspbian-stretch-lite.img from 1.7G to 1.2G
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```
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[![Make Raspberry Pi Images Smaller Using PiShrink][1]][3]
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Make Raspberry Pi Images Smaller Using PiShrink
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As you see in the above output, the size of the Rasberry Pi image has been reduced to **1.2G**.
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You can also use **-s** flag to skip the autoexpanding part of the process.
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```
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$ sudo pishrink.sh -s 2019-04-08-raspbian-stretch-lite.img newpi.img
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```
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This will create a copy of source img file (i.e 2019-04-08-raspbian-stretch-lite.img) into a new img file (newpi.img) and work on it. For more details, check the official GitHub page given at the end.
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And, that’s all for now. Hope this was useful. More good stuffs to come. Stay tuned!
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And, that’s all for now.
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**Resource:**
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* [**PiShrink GitHub Repository**][4]
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* [**Raspberry Pi website**][5]
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--------------------------------------------------------------------------------
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via: https://www.ostechnix.com/pishrink-make-raspberry-pi-images-smaller/
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作者：[sk][a]
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选题：[lujun9972][b]
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译者：[译者ID](https://github.com/译者ID)
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校对：[校对者ID](https://github.com/校对者ID)
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本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
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[a]: https://www.ostechnix.com/author/sk/
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[b]: https://github.com/lujun9972
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[1]: https://www.ostechnix.com/wp-content/uploads/2019/05/pishrink-720x340.png
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[2]: https://www.raspberrypi.org/downloads/
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[3]: http://www.ostechnix.com/wp-content/uploads/2019/05/pishrink-1.png
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[4]: https://github.com/Drewsif/PiShrink
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[5]: https://www.raspberrypi.org/
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@ -0,0 +1,123 @@
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[#]: collector: (lujun9972)
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[#]: translator: (geekpi)
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[#]: reviewer: ( )
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[#]: publisher: ( )
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[#]: url: ( )
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[#]: subject: (PiShrink – Make Raspberry Pi Images Smaller)
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[#]: via: (https://www.ostechnix.com/pishrink-make-raspberry-pi-images-smaller/)
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[#]: author: (sk https://www.ostechnix.com/author/sk/)
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PiShrink - 使树莓派镜像更小
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======
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![Make Raspberry Pi Images Smaller With PiShrink In Linux][1]
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**树莓派**不需要过多介绍。它是一款小巧、价格实惠，只有信用卡大小的电脑，它可以连接到显示器或电视。我们可以连接一个标准的键盘和鼠标，并将其用作一台成熟的台式计算机来完成日常任务，如互联网浏览、播放视频/玩游戏、文字处理和电子表格制作等。它主要是为学校的计算机科学教学而开发的。如今，树莓派被广泛用于大学、中小型组织和研究所来教授编码。如果你有一台树莓派，你可能需要了解一个名为 **“PiShrink”** 的 bash 脚本，该脚本可使树莓派镜像更小。PiShrink 将自动缩小镜像，然后在启动时将其调整为 SD 卡的最大大小。这能更快地将镜像复制到 SD 卡中，同时缩小的镜像将更好地压缩。这对于将大容量镜像放入 SD 卡非常有用。在这个简短的指南中，我们将学习如何在类 Unix 系统中将树莓派镜像缩小到更小的大小。
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### 安装 PiShrink
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要在 Linux 机器上安装 PiShrink，请先使用以下命令下载最新版本：
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```
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$ wget https://raw.githubusercontent.com/Drewsif/PiShrink/master/pishrink.sh
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```
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接下来，将下载的 PiShrink 变成二进制可执行文件：
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```
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$ chmod +x pishrink.sh
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```
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最后，移动到目录：
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```
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$ sudo mv pishrink.sh /usr/local/bin/
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```
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### 使树莓派镜像更小
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你可能已经知道，**Raspbian** 是所有树莓派型号的官方操作系统。树莓派基金会为 PC 和 Mac 开发了**树莓派桌面**版本。你可以创建 live CD，并在虚拟机中运行它，甚至也可以将其安装在桌面上。树莓派也有少量非官方操作系统镜像。为了测试，我从[**官方下载页面**][2]下载了官方的 Raspbian 系统。
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解压下载的系统镜像：
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```
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$ unzip 2019-04-08-raspbian-stretch-lite.zip
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```
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上面的命令将提取当前目录中 **2019-04-08-raspbian-stretch-lite.zip** 文件的内容。
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让我们看下提取文件的实际大小：
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```
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$ du -h 2019-04-08-raspbian-stretch-lite.img
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1.7G 2019-04-08-raspbian-stretch-lite.img
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```
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如你所见，提取的树莓派系统镜像大小为 **1.7G**。
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现在，使用 PiShrink 缩小此文件的大小，如下所示：
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```
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$ sudo pishrink.sh 2019-04-08-raspbian-stretch-lite.img
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```
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示例输出：
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```
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Creating new /etc/rc.local
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rootfs: 39795/107072 files (0.1% non-contiguous), 239386/428032 blocks
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resize2fs 1.45.0 (6-Mar-2019)
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resize2fs 1.45.0 (6-Mar-2019)
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Resizing the filesystem on /dev/loop1 to 280763 (4k) blocks.
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Begin pass 3 (max = 14)
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Scanning inode table XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
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Begin pass 4 (max = 3728)
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Updating inode references XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
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The filesystem on /dev/loop1 is now 280763 (4k) blocks long.
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Shrunk 2019-04-08-raspbian-stretch-lite.img from 1.7G to 1.2G
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```
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[![Make Raspberry Pi Images Smaller Using PiShrink][1]][3]
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使用 PiShrink 使树莓派镜像更小
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正如你在上面的输出中看到的，树莓派镜像的大小已减少到 **1.2G**。
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你还可以使用 **-s** 标志跳过该过程的自动扩展部分。
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```
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$ sudo pishrink.sh -s 2019-04-08-raspbian-stretch-lite.img newpi.img
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```
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这将创建一个源镜像文件（即 2019-04-08-raspbian-stretch-lite.img）的副本到一个新镜像文件（newpi.img）并进行处理。有关更多详细信息，请查看最后给出的官方 GitHub 页面。
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就是这些了。希望本文有用。还有更多好东西，敬请期待！
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**资源：**
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* [**PiShrink 的 GitHub 仓库**][4]
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* [**树莓派网站**][5]
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--------------------------------------------------------------------------------
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via: https://www.ostechnix.com/pishrink-make-raspberry-pi-images-smaller/
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作者：[sk][a]
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选题：[lujun9972][b]
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译者：[geekpi](https://github.com/geekpi)
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校对：[校对者ID](https://github.com/校对者ID)
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本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
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[a]: https://www.ostechnix.com/author/sk/
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[b]: https://github.com/lujun9972
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[1]: https://www.ostechnix.com/wp-content/uploads/2019/05/pishrink-720x340.png
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[2]: https://www.raspberrypi.org/downloads/
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[3]: http://www.ostechnix.com/wp-content/uploads/2019/05/pishrink-1.png
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[4]: https://github.com/Drewsif/PiShrink
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[5]: https://www.raspberrypi.org/
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