Iv'e 在我的系统上安装了 Ubuntu 18.04 的新副本。 现在我将安装 openjdk 8 软件包。以下出来了。
# apt install openjdk-8-jdk
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package openjdk-8-jdk
当我在 apt 缓存中搜索时，将显示以下内容：
apt-cache search openjdk
default-jdk - Standard Java or Java compatible Development Kit
default-jdk-doc - Standard Java or Java compatible Development Kit (documentation)
default-jdk-headless - Standard Java or Java compatible Development Kit (headless)
default-jre - Standard Java or Java compatible Runtime
default-jre-headless - Standard Java or Java compatible Runtime (headless)
openjdk-11-dbg - Java runtime based on OpenJDK (debugging symbols)
openjdk-11-doc - OpenJDK Development Kit (JDK) documentation
openjdk-11-jdk - OpenJDK Development Kit (JDK)
openjdk-11-jdk-headless - OpenJDK Development Kit (JDK) (headless)
openjdk-11-jre - OpenJDK Java runtime, using Hotspot JIT
openjdk-11-jre-headless - OpenJDK Java runtime, using Hotspot JIT (headless)
openjdk-11-source - OpenJDK Development Kit (JDK) source files
有人知道出了什么问题或遗漏了吗？
Oke，我自己通过阅读存储库文档发现了。
您应该能够通过在/etc/apt/sources.list 中添加一行来使用列出的任何镜像，如下所示：
Deb http://security.ubuntu.com/ubuntu 仿生安全主宇宙