Ubuntu
apt-get update 失敗：以下簽名無效
最近，當我嘗試檢查筆記型電腦（Ubuntu 12.04）上的更新時，檢查失敗。
sudo apt-get update:W: GPG error: http://us.archive.ubuntu.com precise Release: The following signatures were invalid: BADSIG 40976EAF437D05B5 Ubuntu Archive Automatic Signing Key <ftpmaster@ubuntu.com> W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/precise/main/i18n/Index No Hash entry in Release file /var/lib/apt/lists/partial/us.archive.ubuntu.com_ubuntu_dists_precise_main_i18n_Index W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/precise/multiverse/i18n/Index No Hash entry in Release file /var/lib/apt/lists/partial/us.archive.ubuntu.com_ubuntu_dists_precise_multiverse_i18n_Index W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/precise/restricted/i18n/Index No Hash entry in Release file /var/lib/apt/lists/partial/us.archive.ubuntu.com_ubuntu_dists_precise_restricted_i18n_Index W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/precise/universe/i18n/Index No Hash entry in Release file /var/lib/apt/lists/partial/us.archive.ubuntu.com_ubuntu_dists_precise_universe_i18n_Index E: Some index files failed to download. They have been ignored, or old ones used instead.
/etc/apt/sources.list（已刪除評論）：deb http://us.archive.ubuntu.com/ubuntu/ precise main restricted deb-src http://us.archive.ubuntu.com/ubuntu/ precise main restricted deb http://us.archive.ubuntu.com/ubuntu/ precise-updates main restricted deb-src http://us.archive.ubuntu.com/ubuntu/ precise-updates main restricted deb http://us.archive.ubuntu.com/ubuntu/ precise universe deb-src http://us.archive.ubuntu.com/ubuntu/ precise universe deb http://us.archive.ubuntu.com/ubuntu/ precise-updates universe deb-src http://us.archive.ubuntu.com/ubuntu/ precise-updates universe deb http://us.archive.ubuntu.com/ubuntu/ precise multiverse deb-src http://us.archive.ubuntu.com/ubuntu/ precise multiverse deb http://us.archive.ubuntu.com/ubuntu/ precise-updates multiverse deb-src http://us.archive.ubuntu.com/ubuntu/ precise-updates multiverse deb http://us.archive.ubuntu.com/ubuntu/ precise-backports main restricted universe multiverse deb-src http://us.archive.ubuntu.com/ubuntu/ precise-backports main restricted universe multiverse deb http://security.ubuntu.com/ubuntu precise-security main restricted deb-src http://security.ubuntu.com/ubuntu precise-security main restricted deb http://security.ubuntu.com/ubuntu precise-security universe deb-src http://security.ubuntu.com/ubuntu precise-security universe deb http://security.ubuntu.com/ubuntu precise-security multiverse deb-src http://security.ubuntu.com/ubuntu precise-security multiverse deb http://archive.canonical.com/ubuntu precise partner deb-src http://archive.canonical.com/ubuntu precise partner deb http://extras.ubuntu.com/ubuntu precise main deb-src http://extras.ubuntu.com/ubuntu precise main deb http://archive.canonical.com/ precise partner deb-src http://archive.canonical.com/ precise partner我不確定如何解決問題並感謝任何輸入。
經過一番搜尋，我找到了解決方案。
刪除/重命名與錯誤相關的文件：
cd /var/lib/apt/lists/partial/ sudo mv us.archive.ubuntu.com_ubuntu_dists_precise_main_i18n_Index main_COPY sudo mv us.archive.ubuntu.com_ubuntu_dists_precise_multiverse_i18n_Index multi_COPY sudo mv us.archive.ubuntu.com_ubuntu_dists_precise_restricted_i18n_Index res_COPY sudo mv us.archive.ubuntu.com_ubuntu_dists_precise_universe_i18n_Index uni_COPY更新簽名：
gpg --keyserver keyserver.ubuntu.com --recv 40976EAF437D05B5重建軟體記憶體：
cd /var/lib/apt sudo mv lists lists.old sudo mkdir -p lists/partial sudo apt-get update可以通過簡單地移動列表來跳過第一步，但我認為最好描述我用來刪除錯誤的整個過程。