最近，我的戴爾 XPS 13 筆記型電腦的選單列中出現了一個紅色警告三角形圖示。當我打開選單時，它告訴我「更新資訊已過時」。
我可以選擇“檢查所有更新”，這將啟動一個名為“更新快取”的視窗。我在下面展示了最終的內容，為了方便閱讀而進行了美化。
我不知道我的 Internet 連線有任何問題，並且在沒有 Internet 連線的情況下無法發布此訊息。
我可以做什麼來解決這些問題？
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下載儲存庫資訊失敗 檢查您的互聯網連接 v 詳細信息
W:GPG error: http://repo.mongodb.org/apt/ubuntu xenial/mongodb-org/3.2 Release: The following signatures were invalid: KEYEXPIRED 1507497109,
W:The repository 'http://repo.mongodb.org/apt/ubuntu xenial/mongodb-org/3.2 Release' is not signed.,
W:Data from such a repository can't be authenticated and is therefore potentially dangerous to use.,
W:See apt-secure(8) manpage for repository creation and user configuration details.,
注意：我已經升級到3.6版本，所以這個數據確實已經過時了。
W:GPG error: http://ftp.debian.org/debian jessie-backports InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 8B48AD6246925553 NO_PUBKEY 7638D0442B90D010,
W:The repository 'http://ftp.debian.org/debian jessie-backports InRelease' is not signed.,
W:Data from such a repository can't be authenticated and is therefore potentially dangerous to use.,
W:See apt-secure(8) manpage for repository creation and user configuration details.,
W:GPG error: http://cdn-fastly.deb.debian.org/debian jessie-backports InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 8B48AD6246925553 NO_PUBKEY 7638D0442B90D010,
W:The repository 'http://httpredir.debian.org/debian jessie-backports InRelease' is not signed.,
W:Data from such a repository can't be authenticated and is therefore potentially dangerous to use.,
W:See apt-secure(8) manpage for repository creation and user configuration details.,
W:The repository 'http://ppa.launchpad.net/fta/gnome3/ubuntu xenial Release' does not have a Release file.,
W:Data from such a repository can't be authenticated and is therefore potentially dangerous to use.,
W:See apt-secure(8) manpage for repository creation and user configuration details.,
W:The repository 'http://ppa.launchpad.net/nvbn-rm/ppa/ubuntu xenial Release' does not have a Release file.,
W:Data from such a repository can't be authenticated and is therefore potentially dangerous to use.,
W:See apt-secure(8) manpage for repository creation and user configuration details.,
W:The repository 'http://ppa.launchpad.net/vincent-c/nevernote/ubuntu xenial Release' does not have a Release file.,
W:Data from such a repository can't be authenticated and is therefore potentially dangerous to use.,
W:See apt-secure(8) manpage for repository creation and user configuration details.,
E:Failed to stat /var/lib/apt/lists/partial/deb.opera.com_opera-stable_dists_stable_InRelease - pkgAcqTransactionItem::TransactionState-stat (2: No such file or directory),
E:Failed to stat /var/lib/apt/lists/partial/deb.opera.com_opera-stable_dists_stable_non-free_binary-amd64_Packages - pkgAcqTransactionItem::TransactionState-stat (2: No such file or directory),
E:Failed to stat /var/lib/apt/lists/partial/deb.opera.com_opera-stable_dists_stable_non-free_binary-i386_Packages - pkgAcqTransactionItem::TransactionState-stat (2: No such file or directory)
答案1
停用不支援的更新系統設定軟體並更新向後移植！ 。 ..檢查你的儲存庫。 /etc/apt/sources.list
刪除歌劇：
sudo apt-get purge opera-stable
sudo apt-get update
sudo apt-get clean
sudo apt-get update
sudo apt-get upgrade
安裝歌劇：
sudo apt-get install opera-stable
您正在使用 Xenial，但您的 resources.list 包含 Precise 的連結。傑西
備份目前的sources.list：
sudo mv /etc/apt/sources.list /etc/apt/sources.list.bak
建立新列表https://help.ubuntu.com/community/Repositories/CommandLine
儲存並嘗試sudo apt-get update