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我正在运行 Ubuntu 14.04 64 位。我的系统托盘中出现错误：

系统托盘错误

sudo apt-get update运行正常。

但sudo apt-get upgrade返回以下内容：

Reading package lists... Done
Reading package lists... Done
Building dependency tree       
Reading state information... Done
You might want to run 'apt-get -f install' to correct these.
The following packages have unmet dependencies:
 libqt4-opengl:i386 : Depends: libqtcore4:i386 (= 4:) but 4:4.8.5+git192-g085f851+dfsg-2ubuntu4 is installed
E: Unmet dependencies. Try using -f.

根据建议，我尝试sudo apt-get install -f修复它。返回了另一个错误：

Reading package lists... Done
Building dependency tree       
Reading state information... Done
Correcting dependencies... Done
The following extra packages will be installed:
  libqt4-opengl:i386
The following packages will be upgraded:
  libqt4-opengl:i386
1 upgraded, 0 newly installed, 0 to remove and 10 not upgraded.
Need to get 0 B/300 kB of archives.
After this operation, 0 B of additional disk space will be used.
Do you want to continue? [Y/n] 
dpkg: error: parsing file '/var/lib/dpkg/status' near line 24899 package 'libqt4-opengl:i386':
 'Depends' field, reference to 'libqtcore4': error in version: nothing after colon in version number
E: Sub-process /usr/bin/dpkg returned an error code (2)

的输出sudo apt-cache policy libqtcore4:i386为：

libqtcore4:i386:
  Installed: 4:4.8.5+git192-g085f851+dfsg-2ubuntu4
  Candidate: 4:4.8.5+git192-g085f851+dfsg-2ubuntu4
  Version table:
 *** 4:4.8.5+git192-g085f851+dfsg-2ubuntu4 0
        500 http://pt.archive.ubuntu.com/ubuntu/ trusty/main i386 Packages
        100 /var/lib/dpkg/status

的输出cat -n /var/lib/dpkg/status | sed -n '/Package: libqt4-opengl/,/Depends/p'为：

 24865  Package: libqt4-opengl
 24866  Status: install ok installed
 24867  Priority: optional
 24868  Section: libs
 24869  Installed-Size: 1228
 24870  Maintainer: Kubuntu Developers <[email protected]>
 24871  Architecture: amd64
 24872  Multi-Arch: same
 24873  Source: qt4-x11
 24874  Version: 4:4.8.5+git192-g085f851+dfsg-2ubuntu4
 24875  Depends: libc6 (>= 2.14), libfreetype6 (>= 2.2.1), libgcc1 (>= 1:4.1.1), libgl1-mesa-glx | libgl1, libqtcore4 (= 4:4.8.5+git192-g085f851+dfsg-2ubuntu4), libqtgui4 (= 4:4.8.5+git192-g085f851+dfsg-2ubuntu4), libstdc++6 (>= 4.1.1), libx11-6, libxrender1
 24889  Package: libqt4-opengl
 24890  Status: install ok installed
 24891  Priority: optional
 24892  Section: libs
 24893  Installed-Size: 1220
 24894  Maintainer: Kubuntu Developers <[email protected]>
 24895  Architecture: i386
 24896  Multi-Arch: same
 24897  Source: qt4-x11
 24898  Version: 4:4.8.5+git192-g085f851+dfsg-2ubuntu4
 24899  Depends: libc6 (>= 2.4), libfreetype6 (>= 2.2.1), libgcc1 (>= 1:4.1.1), libgl1-mesa-glx | libgl1, libqtcore4 (= 4:), libqtgui4 (= 4:4.8.5+git192-g085f851+dfsg-2ubuntu4), libstdc++6 (>= 4.1.1), libx11-6, libxrender1

我该如何修复此问题？

答案1

执行以下命令：

sudo cp /var/lib/dpkg/status{,.bak}
sudo sed -i '24899s/(= 4:)/(= 4:4.8.5+git192-g085f851+dfsg-2ubuntu4)/' /var/lib/dpkg/status
sudo apt-get install -f

这应该修理它。

解释

sudo apt-get upgrade从你的和的输出中sudo apt-get install -f：

The following packages have unmet dependencies:
 libqt4-opengl:i386 : Depends: libqtcore4:i386 (= 4:) but 4:4.8.5+git192-g085f851+dfsg-2ubuntu4 is installed

dpkg: error: parsing file '/var/lib/dpkg/status' near line 24899 package 'libqt4-opengl:i386':
 'Depends' field, reference to 'libqtcore4': error in version: nothing after colon in version number

libqt4-opengl:i386需要libqtcore4:i386安装，但出于某种原因，它正在寻找其版本4:（查看我请求的输出中的最后一行）。这是一个错误的版本号。我不知道是什么原因导致它这样做，但我们会尝试修复它正在寻找的版本。

根据这一页libqtcore4:i386，我们可以看到它真正需要的版本是4:4.8.5+git192-g085f851+dfsg-2ubuntu4（从 的输出中可以看出，您已经安装了该版本apt-cache policy libqtcore4:i386）。因此，我们可以通过编辑文件/var/lib/dpkg/status以使其查找正确的版本来修复此问题，然后重试该apt-get命令。

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