我尝试了网上的各种建议，但都没有成功。apt-get update出现错误。以下是我执行此操作后的错误消息sudo apt-get udpate：
W: Failed to fetch http://ppa.launchpad.net/upubuntu-com/java/ubuntu/dists/trusty/main/binary-amd64/Packages 404 Not Found
W: Failed to fetch http://ppa.launchpad.net/upubuntu-com/java/ubuntu/dists/trusty/main/binary-i386/Packages 404 Not Found
E: Some index files failed to download. They have been ignored, or old ones used instead.
我查看并尝试了现有的 stackexchange 答案，但对我不起作用。尝试按照 source 中的建议清理 ppa 会出现以下错误：例如，以下用于删除 ppa 的命令会显示其他令人恐惧的消息：
winsella@winsella:~$ sudo rm /etc/apt/sources.list.d/ppaname-ppa-$(lsb_release -sc).list*
[sudo] password for winsella:
no talloc stackframe at ../source3/param/loadparm.c:4864, leaking memory
Failed to open /var/lib/samba/private/secrets.tdb
tdbsam_open: Failed to open/create TDB passwd [/var/lib/samba/private/passdb.tdb]
tdbsam_getsampwnam: failed to open /var/lib/samba/private/passdb.tdb!
tdbsam_open: Failed to open/create TDB passwd [/var/lib/samba/private/passdb.tdb]
tdbsam_getsampwnam: failed to open /var/lib/samba/private/passdb.tdb!
tdbsam_open: Failed to open/create TDB passwd [/var/lib/samba/private/passdb.tdb]
tdbsam_new_rid: failed to open /var/lib/samba/private/passdb.tdb!
rm: cannot remove ‘/etc/apt/sources.list.d/ppaname-ppa-trusty.list*’: No such file or directory
答案1
您是在专门寻找 Oracle 7 java？如果是这样，@user283885 给出的答案可能会让您更幸运。Webupd8 也有一个 Oracle 8 java 安装程序，网址为此链接。
但是，如果你只是想要易于维护的 Java 运行时，你应该考虑从软件源中删除 PPS，并使用 Ubuntu 软件中心加载 OpenJDK（版本 6 或版本 7）