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By calculating the image's `checksum` on your own computer and comparing it to the original `checksum`, you can verify the image has not been tampered with or corrupted. The original checksum values are provided at link:++https://getfedoraproject.org/security/++[], and are [command]#gpg# signed to demonstrate their integrity.
English type: Plain text
By calculating the image's `checksum` on your own computer and comparing it to the original `checksum`, you can verify the image has not been tampered with or corrupted. The original checksum values are provided at link:++https://fedoraproject.org/security/++[], and are [command]#gpg# signed to demonstrate their integrity.
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English Chinese (Simplified) (zh_CN) Actions
To write the image onto the media, click the red btn:[Write to disk] button.
要将映像写入介质，请单击红色的 btn:[写入磁盘]按钮。
Fedora Media Writer Write to USB Device
Fedora Media Writer 写入U盘
Image of Fedora Media Writer write to device red button
Fedora Media Writer 写入设备的红按钮
fedora_media_writer/FMW-writing-5.png
fedora_media_writer/FMW-writing-5.png
Other methods to create a live USB
创建Live USB 的其他方法
Using the *Fedora Media Writer* is highly recommended for everybody, because it offers a reliable way to create a live USB stick for Fedora installation.
强烈建议大家使用 *Fedora Media Writer*，因为它提供了一种可靠的方法来创建用于安装 Fedora 的Live U 盘。
However, some experienced users may prefer to go through the creation process manually. If you decide to do so, you have to download the installation images and use an application to write them onto the USB stick.
不过，一些有经验的用户可能更愿意手动完成创建过程。如果您决定这样做，就必须下载安装映像，并使用应用程序将其写入 U 盘。
If you have downloaded and verified the installation images manually, you still can write them onto the USB stick using *Fedora Media Writer*.
如果您已手动下载并验证了安装映像，仍可使用 *Fedora Media Writer* 将其写入 U 盘。
Downloading Boot and Installation Images
下载启动和安装映像
The Fedora Project offers different Editions tailored for some specific use cases. Choose the Fedora Edition best for you. You can also build your own by customizing Fedora after it's installed or by using a kickstart file as described in _Creating a Kickstart File_.
Fedora 项目针对一些特定的使用情况提供不同的版本。请选择最适合您的 Fedora 版本。您也可以在 Fedora 安装完成后对其进行自定义，或者使用 _创建一个Kickstart文件_ 所描述的Kickstart文件来创建您自己的 Fedora 版本。
Kickstart installation requires the `netinstall` media type, or a direct installation booting method such as PXE; kickstarts are not supported with live images.
Kickstart 安装要求使用 `网络安装` 介质类型或 PXE 等直接安装启动的方法；Live映像不支持 kickstart。
Read more about Fedora Workstation, Fedora Cloud, Fedora Server and the available media types in _Downloading Fedora_.
了解更多有关 Fedora 工作站、Fedora 云、Fedora 服务器版和可用介质类型的信息，请参阅 _下载 Fedora_。
You can also choose a Fedora _Spin_ featuring favorite alternative desktops or tools for specialized tasks at link:++https://spins.fedoraproject.org++[].
您还可以在 link:++https://spins.fedoraproject.org++[]中选择 Fedora _定制版_，其中包含您最喜爱的替代桌面环境或用于专门任务的工具。
Verifying the Downloaded Image
正在验证已下载的镜像
Because transmission errors or other problems may corrupt the Fedora image you have downloaded, it is important to verify the file's integrity. After the images are created, an operation is performed on the file that produces a value called a `checksum` using a complex mathematical algorithm. The operation is sufficiently complex that *any change* to the original file will produce a different checksum.
由于传输错误或其他问题可能会损坏您下载的 Fedora 映像，因此验证文件的完整性非常重要。镜像创建后，会对文件执行一个操作，使用复杂的数学算法生成一个称为 `校验和` 的值。该操作非常复杂，以至于对原始文件的 *任何改动*都会产生不同的校验和。
By calculating the image's `checksum` on your own computer and comparing it to the original `checksum`, you can verify the image has not been tampered with or corrupted. The original checksum values are provided at link:++https://fedoraproject.org/security/++[], and are [command]#gpg# signed to demonstrate their integrity.
通过在自己的计算机上计算映像的 `校验和`并将其与原始 `校验和`进行比较，您可以验证映像是否被篡改或损坏。原始校验和值在 link:++https://getfedora.org/security/++[]中提供，并有 [command]#gpg#签名以证明其完整性。
Verifying checksums on Windows systems
在 Windows 系统上验证校验和
Download the Fedora image of your choice from link:++https://fedoraproject.org/++[] and the corresponding checksum file from link:++https://fedoraproject.org/security/++[]
从 link:++https://fedoraproject.org/get-fedora++[]下载您选择的 Fedora 映像，并从 link:++https://getfedora.org/security/++[]下载相应的校验和文件
Open a [command]#powershell# session.
打开一个 [command]#powershell# 会话。
Change to the directory containing the downloaded files.
定位到包含下载文件的目录。
> cd $HOME\Downloads\
> ls
> cd $HOME\Downloads\
> ls
Directory: C:\Users\Pete\Downloads
目录： C:\Users\Pete\Downloads
Mode LastWriteTime Length Name
---- ------------- ------ ----
-a--- 11/25/2014 12:39 PM 272 Fedora-Server-21-x86_64-CHECKSUM
-a--- 11/25/2014 12:39 PM 2047868928 Fedora-Server-DVD-x86_64-21.iso
Mode LastWriteTime Length Name
---- ------------- ------ ----
-a--- 11/25/2014 12:39 PM 272 Fedora-Server-21-x86_64-CHECKSUM
-a--- 11/25/2014 12:39 PM 2047868928 Fedora-Server-DVD-x86_64-21.iso
Load the resources required to calculate the checksum.
加载计算校验和所需的资源。
> $image = "Fedora-Server-DVD-x86_64-21.iso"
> $checksum_file = "Fedora-Server-21-x86_64-CHECKSUM"
> $sha256 = New-Object -TypeName System.Security.Cryptography.sha256CryptoServiceProvider
> $expected_checksum = ((Get-Content $checksum_file | Select-String -Pattern $image) -split " ")[0].ToLower()
> $image = "Fedora-Server-DVD-x86_64-21.iso"
> $checksum_file = "Fedora-Server-21-x86_64-CHECKSUM"
> $sha256 = New-Object -TypeName System.Security.Cryptography.sha256CryptoServiceProvider
> $expected_checksum = ((Get-Content $checksum_file | Select-String -Pattern $image) -split " ")[0].ToLower()
Calculate the downloaded image's checksum. This will take a while!
计算下载图像的校验和。这需要一些时间！
> $download_checksum = [System.BitConverter]::ToString($sha256.ComputeHash([System.IO.File]::ReadAllBytes("$PWD\$image"))).ToLower() -replace '-', ''
> $download_checksum = [System.BitConverter]::ToString($sha256.ComputeHash([System.IO.File]::ReadAllBytes("$PWD\$image"))).ToLower() -replace '-', ''
Compare the calculated checksum to the expected checksum.
将计算出的校验和与预期校验和进行比较。
> echo "Download Checksum: $download_checksum"
> echo "Expected Checksum: $expected_checksum"
> if ( $download_checksum -eq "$expected_checksum" ) {
echo "Checksum test passed!"
} else {
echo "Checksum test failed."
}
> echo "Download Checksum: $download_checksum"
> echo "Expected Checksum: $expected_checksum"
> if ( $download_checksum -eq "$expected_checksum" ) {
echo "Checksum test passed!"
} else {
echo "Checksum test failed."
}
Verifying checksums on Linux and macOS systems
在 Linux 和 macOS 系统上验证校验和
Download the Fedora image of your choice from link:++https://fedoraproject.org/get-fedora++[] and the corresponding checksum file from link:++https://fedoraproject.org/security/++[]
从 link:++https://fedoraproject.org/get-fedora++[]下载您选择的 Fedora 映像，并从 link:++https://getfedora.org/security/++[]下载相应的校验和文件

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By calculating the image's `checksum` on your own computer and comparing it to the original `checksum`, you can verify the image has not been tampered with or corrupted. The original checksum values are provided at link:++https://fedoraproject.org/security/++[], and are [command]#gpg# signed to demonstrate their integrity.
通过在自己的计算机上计算映像的 `校验和`并将其与原始 `校验和`进行比较，您可以验证映像是否被篡改或损坏。原始校验和值在 link:++https://getfedora.org/security/++[]中提供，并有 [command]#gpg#签名以证明其完整性。
2 weeks ago
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Source string changed
By calculating the image's `checksum` on your own computer and comparing it to the original `checksum`, you can verify the image has not been tampered with or corrupted. The original checksum values are provided at link:++https://getfedoraproject.org/security/++[], and are [command]#gpg# signed to demonstrate their integrity.
2 weeks ago
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18933624 String information

Source string description
type: Plain text
Source string location
pages/preparing-boot-media.adoc:153
String age
2 weeks ago
Last updated
2 weeks ago
Source string age
2 weeks ago
Translation file
po/zh_CN/f41/pages/preparing-boot-media.po, string 65