ftp://debian.cn99.com的GPG

LaoLiulaoliu

我在sources.list中添加如下源：
deb ftp://debian.cn99.com/debian etch main contrib non-free
deb-src ftp://debian.cn99.com/debian etch main contrib non-free
在apt-get update 时最后出现错误：
W: GPG error: ftp://debian.cn99.com etch Release: Unknown error executing gpgv
W: Duplicate sources.list entry ftp://debian.cn99.com etch/main Packages (/var/lib/apt/lists/debian.cn99.com_debian_dists_etch_main_binary-amd64_Packages)
W: Duplicate sources.list entry ftp://debian.cn99.com etch/contrib Packages (/var/lib/apt/lists/debian.cn99.com_debian_dists_etch_contrib_binary-amd64_Packages)
W: Duplicate sources.list entry ftp://debian.cn99.com etch/non-free Packages (/var/lib/apt/lists/debian.cn99.com_debian_dists_etch_non-free_binary-amd64_Packages)
W: You may want to run apt-get update to correct these problems
请问是gpg的问题吗？ftp://debian.cn99.com上没有gpg阿！