W: GPG error: http://download.opensuse.org Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 3EF2666A18CEC0F6
W: Failed to fetch http://ppa.launchpad.net/libreoffice/libreoffice-4-4/ubuntu/dists/precise/main/source/Sources 404 Not Found
W: Failed to fetch /ppa.launchpad.net/libreoffice/libreoffice-4-4/ubuntu/dists/precise/main/binary-amd64/Packages 404 Not Found
W: Failed to fetch /ppa.launchpad.net/libreoffice/libreoffice-4-4/ubuntu/dists/precise/main/binary-i386/Packages 404 Not Found
E: Some index files failed to download. They have been ignored, or old ones used instead.
我试过了sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 3EF2666A18CEC0F6
，但是没有用
错误：
Executing: gpg --ignore-time-conflict --no-options --no-default-keyring --secret-keyring /tmp/tmp.zpQPsXehS9 --trustdb-name /etc/apt/trustdb.gpg --keyring /etc/apt/trusted.gpg --primary-keyring /etc/apt/trusted.gpg --keyserver keyserver.ubuntu.com --recv-keys 3EF2666A18CEC0F6
gpg: requesting key 18CEC0F6 from hkp server keyserver.ubuntu.com
gpgkeys: key 3EF2666A18CEC0F6 not found on keyserver
gpg: no valid OpenPGP data found.
gpg: Total number processed: 0
我也试过
sudo rm /var/lib/apt/lists/* -vf
之后我尝试使用y-ppa-manager，但仍然出现错误
答案1
您可以通过进入更新管理器 > 设置 > 软件源并取消选中 libre-office-4-4 软件包来解决此问题