1、apt-get update遇到错误
W: GPG error: ftp://ftp.cn.debian.org stable Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY AED4B06F473041FA
解决办法:apt-get install debian-archive-keyring 即可
2、寻找apt源
使用apt-spy
#apt-get install apt-spy
#mv /etc/apt/sources.list /etc/apt/sources.list.bak
#apt-spy update
#apt-spy -d stable -a asia -t 5
会新生成source.list
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