最近，當我嘗試在筆記型電腦（Ubuntu 12.04）上檢查更新時，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 <[email protected]>
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（評論已刪除）：
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
我不確定如何解決該問題並感謝任何意見。
答案1
經過更多搜索後我發現解決方案。
刪除/重新命名與錯誤相關的檔案：
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
重建軟體緩存：
cd /var/lib/apt
sudo mv lists lists.old
sudo mkdir -p lists/partial
sudo apt-get update
只需移動列表就可以跳過第一步，但我認為最好描述我用來刪除錯誤的整個過程。
答案2
嘗試導入新密鑰：
gpg --keyserver keyserver.ubuntu.com --recv 40976EAF437D05B5
gpg --export --armor 40976EAF437D05B5 | sudo apt-key add -