packer-cn/website/source/partials/common/_ISOConfig.html.md

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<!-- Code generated from the comments of the ISOConfig struct in common/iso_config.go; DO NOT EDIT MANUALLY -->
By default, Packer will symlink, download or copy image files to the Packer
cache into a "`hash($iso_url+$iso_checksum).$iso_target_extension`" file.
Packer uses [hashicorp/go-getter](https://github.com/hashicorp/go-getter) in
file mode in order to perform a download.
go-getter supports the following protocols:
* Local files
* Git
* Mercurial
* HTTP
* Amazon S3
\~&gt; On windows - when referencing a local iso - if packer is running
without symlinking rights, the iso will be copied to the cache folder. Read
[Symlinks in Windows 10
!](https://blogs.windows.com/buildingapps/2016/12/02/symlinks-windows-10/)
for more info.
Examples:
go-getter can guess the checksum type based on `iso_checksum` len.
``` json
{
"iso_checksum": "946a6077af6f5f95a51f82fdc44051c7aa19f9cfc5f737954845a6050543d7c2",
"iso_url": "ubuntu.org/.../ubuntu-14.04.1-server-amd64.iso"
}
```
``` json
{
"iso_checksum_type": "file",
"iso_checksum": "ubuntu.org/..../ubuntu-14.04.1-server-amd64.iso.sum",
"iso_url": "ubuntu.org/.../ubuntu-14.04.1-server-amd64.iso"
}
```
``` json
{
"iso_checksum_url": "./shasums.txt",
"iso_url": "ubuntu.org/.../ubuntu-14.04.1-server-amd64.iso"
}
```
``` json
{
"iso_checksum_type": "sha256",
"iso_checksum_url": "./shasums.txt",
"iso_url": "ubuntu.org/.../ubuntu-14.04.1-server-amd64.iso"
}
```