特殊:Badtitle/NS100:JigdoDownloadHowto:修订间差异
小无编辑摘要 |
小无编辑摘要 |
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第55行: | 第55行: | ||
If you have no additional sources you can press '''ENTER''' twice and it will download the remaining packages that it needs. This, again, significantly cuts down on bandwidth and download time & easily keeps you up to date on the latest daily builds. | If you have no additional sources you can press '''ENTER''' twice and it will download the remaining packages that it needs. This, again, significantly cuts down on bandwidth and download time & easily keeps you up to date on the latest daily builds. | ||
=== Links === | === Links === | ||
* [[UbuntuHelp:BurningIsoHowto]] Instructions on Burning the finished CD image | * [[UbuntuHelp:BurningIsoHowto|BurningIsoHowto]] Instructions on Burning the finished CD image | ||
* [[UbuntuHelp:MountIso]] Loop mounting a CD image without burning it | * [[UbuntuHelp:MountIso|MountIso]] Loop mounting a CD image without burning it | ||
[[category:CategoryDocumentation]] | [[category:CategoryDocumentation]] | ||
[[category:UbuntuHelp]] | [[category:UbuntuHelp]] |
2008年10月19日 (日) 23:34的版本
文章出处: |
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Definition
Jigdo (JIGsaw-DOwnload) can be used to efficiently download daily CD builds or update existing .iso images without the need to re-download the entire CD image. It simply checks for differences or updates between an existing CD image (on your system) and the latest released image.
Installation
Install the required packages for Jigdo.
sudo aptitude install jigdo-file
Use & Example downloading Ubuntu 8.10 (Intrepid Ibex)
Note: Using a development release is not recommended unless you do not mind (possibly frequent) crashes and other problems. Start the program from the terminal:
jigdo-lite
Supply the .jigdo file
The program then asks you for the URL to the .jigdo template you want to download.
Jigsaw Download "lite" Copyright (C) 2001-2005 | jigdo@ Richard Atterer | atterer.net Getting mirror information from /etc/apt/sources.list ----------------------------------------------------------------- To resume a half-finished download, enter name of .jigdo file. To start a new download, enter URL of .jigdo file. You can also enter several URLs/filenames, separated with spaces, or enumerate in {}, e.g. `http://server/cd-{1_NONUS,2,3}.jigdo' jigdo:
In this situation we'll use Current Daily Build (copy link-location & paste into prompt above)
Supply previous CD image
Jigdo will then download a copy of the .jigdo file and prompt you for any previous images you have to base the download from. Here you can point Jigdo to an existing burned copy of the CD image, or loop-mounted ISO image (see IsoMount). (eg. /media/cdrom or /media/cdimage)
If you already have a previous version of the CD you are downloading, jigdo can re-use files on the old CD that are also present in the new image, and you do not need to download them again. Mount the old CD ROM and enter the path it is mounted under (e.g. `/mnt/cdrom'). Alternatively, just press enter if you want to start downloading the remaining files.
If you didn't burn the old image to a CD, you can loop-mount it (see IsoMount)
sudo mkdir /media/cdimage sudo mount -o loop intrepid-alternate-i386.iso /media/cdimage
Comparing files
Jigdo then scans the existing files & compares them with the latest copies from the .jigdo template.
Found xxxx of the xxxx files required by the template Copied input files to temporary file `intrepid-alternate-i386.iso.tmp' - repeat command and supply more files to continue
At this point you can include any additional sources you might have (optional) or press ENTER to continue to the next step. If you have no additional sources you can press ENTER twice and it will download the remaining packages that it needs. This, again, significantly cuts down on bandwidth and download time & easily keeps you up to date on the latest daily builds.
Links
- BurningIsoHowto Instructions on Burning the finished CD image
- MountIso Loop mounting a CD image without burning it