最近在terminal软件更新时，出现W: 无法下载..........Hash 校验和不符，遍寻方法而难解

[电子云]

W: 无法下载 bzip2:/var/lib/apt/lists/partial/ftp.sjtu.edu.cn_ubuntu_dists_precise-security_universe_binary-amd64_Packages Hash 校验和不符

W: 无法下载 bzip2:/var/lib/apt/lists/partial/ftp.sjtu.edu.cn_ubuntu_dists_precise-security_main_binary-i386_Packages Hash 校验和不符

W: 无法下载 bzip2:/var/lib/apt/lists/partial/ppa.launchpad.net_lainme_libqq_ubuntu_dists_precise_main_binary-amd64_Packages Hash 校验和不符

W: 无法下载 bzip2:/var/lib/apt/lists/partial/ppa.launchpad.net_lainme_libqq_ubuntu_dists_precise_main_binary-i386_Packages Hash 校验和不符

E: Some index files failed to download. They have been ignored, or old ones used instead.

最近几次更新时，总出现这几条错误信息，看了网上很多帖子依然无解，有哪位大神能帮忙解决一下，万分感谢

[eexpress]

换源就是。

[电子云]

W: GPG 错误：http://archive.ubuntu.com precise-security 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/ppa.launchpad.net_lainme_libqq_ubuntu_dists_precise_main_binary-amd64_Packages Hash 校验和不符

W: 无法下载 bzip2:/var/lib/apt/lists/partial/ppa.launchpad.net_lainme_libqq_ubuntu_dists_precise_main_binary-i386_Packages Hash 校验和不符

W: 无法下载 bzip2:/var/lib/apt/lists/partial/archive.ubuntu.com_ubuntu_dists_precise-updates_main_binary-amd64_Packages Hash 校验和不符

W: 无法下载 gzip:/var/lib/apt/lists/partial/archive.ubuntu.com_ubuntu_dists_precise-security_main_source_Sources Encountered a section with no Package: header

E: Some index files failed to download. They have been ignored, or old ones used instead.

换成主服务器的源 结果还是一样

[长头发的和尚]

换163的试试。

[电子云]

E: GPG 错误：http://mirrors.163.com precise Release: 下列签名无效： NODATA 1 NODATA 2

虽然只有一个错误