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更新管理器（或软件更新器）是 apt-get dist-upgrade 的前端吗？

我注意到我的系统今天表现得很奇怪。虽然更新管理器（gui 应用程序）指出选择了 14 个更新，并且将下载 52 Mb，但该apt-get upgrade命令仅通知我要下载和安装 1 个更新。

可以在此处找到更新管理器 Gui（输出）：

和apt-get upgrade这里的 cli输出：

fokis@fokis-netbook:~$ sudo apt-get upgrade
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following packages have been kept back:
  ginn libgrip0 linux-generic linux-headers-generic linux-headers-generic-pae
  linux-image-generic
The following packages will be upgraded:
  linux-libc-dev
1 upgraded, 0 newly installed, 0 to remove and 6 not upgraded.
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