去落格博客阅读完整排版的Package xxx has no installation candidate on Raspberry Pi

当新刷好的树莓派镜像启用时，你有可能会遇到奇怪的 apt 错误：

root@raspberrypi:/home/pi# apt install default-jre
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Package default-jre is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source

E: Package 'default-jre' has no installation candidate

当然，不止这一个，安装任何包都会是 Package xxx has no installation candidate

解决办法

首先查看你的 /etc/apt/sources.list ，看看里边的源地址是不是都被注释掉了，这里我的是正常的。

那应该就是 apt 缓存的问题，到目录 /var/lib/apt 执行命令 sudo rm -r lists

删除全部缓存，然后执行 sudo apt update

此时 apt 应该就可以正确安装各种包了。

Package xxx has no installation candidate on Raspberry Pi，首发于落格博客。