相关疑难解决方法(0)

我刚刚为 GIMP 的开发版本添加了一个 PPA 存储库，但出现此错误：

$ apt-get update && apt-get upgrade
...
The following packages have been kept back:
  gimp gimp-data libgegl-0.0-0 libgimp2.0

为什么以及如何解决它以便我可以使用最新版本而不是我现在拥有的版本？

sudo apt-get upgrade 不是升级包

hp@hp-HP-15-Notebook-PC:~$ sudo apt-get upgrade
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Calculating upgrade... Done
The following packages have been kept back:
  libnss3 openjdk-7-jdk openjdk-7-jre openjdk-7-jre-headless thunderbird
  thunderbird-gnome-support
0 upgraded, 0 newly installed, 0 to remove and 6 not upgraded.
hp@hp-HP-15-Notebook-PC:~$