我正在尝试在我的系统上安装 Java。
当我跑步时
sudo apt-get install default-jdk
我明白了
E：无法找到软件包 default-jdk
在此之前我用过
sudo apt-get update && apt-get upgrade
并得到：
>Ign:1 http://ppa.launchpad.net/fossfreedom/packagefixes/ubuntu yakkety InRelease
.
.
.
Err:16 http://ppa.launchpad.net/fossfreedom/packagefixes/ubuntu yakkety/main amd64 Packages
404 Not Found
.
.
.
yakkety/main DEP-11 64x64 Icons
Err:26 http://ppa.launchpad.net/jonathonf/vlc/ubuntu yakkety/main i386 Packages
404 Not Found
.
.
.
Fetched 2,802 B in 18s (154 B/s)
Reading package lists... Done
W: The repository 'http://ppa.launchpad.net/fossfreedom/packagefixes/ubuntu yakkety Release' does not have a Release file.
N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration details.
W: The repository 'http://ppa.launchpad.net/jonathonf/vlc/ubuntu yakkety Release' does not have a Release file.
N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: Failed to fetch http://ppa.launchpad.net/fossfreedom/packagefixes/ubuntu/dists/yakkety/main/binary-amd64/Packages 404 Not Found
E: Failed to fetch http://ppa.launchpad.net/jonathonf/vlc/ubuntu/dists/yakkety/main/binary-i386/Packages 404 Not Found
E: Some index files failed to download. They have been ignored, or old ones used instead.
我也尝试修复 PPA 存储库，但我不确定我是否朝着正确的方向努力。
我该如何解决这个问题？
答案1
我以前也发生过这种情况，尽管我的发布版本是受支持的版本（有时 oracle repo 会更新 Java，而 ppa 会尝试从旧链接下载安装程序）。
在此关联您可以看到以下内容：
Ubuntu 16.10 Yakkety Yak 不再受 Canonical 支持（因此 Launchpad 和此 PPA 也不再支持）。此 PPA 支持 Ubuntu 17.10、17.04、16.04、14.04 和 12.04。
不过，如果你需要在 Ubuntu 中安装 Java，我建议直接从 .tar.gz 文件安装这里按照安装说明操作，你只需要解压 .tar.gz 文件并更新 Java 的替代方案即可关联解释。