尝试使用以下命令安装 synaptic 包管理器时出现以下错误：
$ sudo apt-get install synaptic.
Reading package lists...
Done
Building dependency tree
Reading state information... Done
Package synaptic 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 'synaptic' has no installation candidate
还尝试过：
sudo apt-get update
sudo apt-get upgrade
sudo apt-get install synaptic
仍然收到相同消息。在我的其他主机上安装正常。
Ubuntu 16.04 LTS
答案1
您需要启用universe存储库。
在命令行中：
sudo add-apt-repository universe
或者使用软件属性：
打开软件源：
并勾选“社区维护的开源软件（宇宙）”：
