Jigdo

Jigdo（"Jigsaw download"，曲线下载）是为Debian套件设计的下载工具，可以从几个镜像站点下载不同的文件，然后再生成一个CD image。

Jigdo的标准程序包括一个jigdo-file工具。用户要收集一个CD image，先得下载一个非常小的imagename.jigdo文件。jigdo-file工具就将这个文件作为参数，从网络上获取相应的文件：imagename.template和一系列.deb包（在.jigdo文件中已经列出）。然后通过mkisofs工具生成一个ISO image。

Jigdo was implemented in Debian in order to reduce the need to have many CD image mirror sites, locations with sufficient disk space and bandwidth to serve numerous 650 MB files (and in more recent times, 4.7 GB files for DVD images). Instead, Jigdo files allow mirrors to carry the regular Debian archive, where packages are not grouped together in image files and instead kept separately where they're also apt-gettable, and still allow for the making of CD/DVD images.

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