用的debian.cn99.com上的etch源。
错误信息如下: Failed to fetch http://debian.cn99.com/debian/dists/etch-proposed-updates/non-free/binary-i386/Packages.bz2 MD5Sum mismatch Failed to fetch http://debian.cn99.com/debian/dists/etch-proposed-updates/non-free/source/Sources.bz2 MD5Sum mismatch Reading package lists... Done W: Couldn't stat source package list http://debian.cn99.cometch-proposed-updates/non-free Packages (/var/lib/apt/lists/debian.cn99.com_debian_dists_etch-proposed-updates_non-free_binary-i386_Packages) - stat (2 No such file or directory) W: Couldn't stat source package list http://debian.cn99.cometch-proposed-updates/non-free Packages (/var/lib/apt/lists/debian.cn99.com_debian_dists_etch-proposed-updates_non-free_binary-i386_Packages) - stat (2 No such file or directory) W: You may want to run apt-get update to correct these problems E: Some index files failed to download, they have been ignored, or old ones used instead.

