摘要： W: GPG 错误：http://mirrors.163.com precise-proposed Release: 下列签名无效： BADSIG 40976EAF437D05B5 Ubuntu Archive Automatic Signing Key <ftpmaster@ubuntu.com>W: 无法下载 bzip2:/var/lib/apt/lists/partial/mirrors.163.com_ubuntu_dists_precise-updates_universe_binary-i386_Packages Hash 校验和不符先删除密钥sudo gpg --de 阅读全文