我试图从 ubuntu 14.10 升级到 15.04，它停止升级并提供了我没有做的部分升级。现在我遇到了deja-dup-monitor消耗大约 7GB 内存的问题。我正在尝试卸载它。但是每当我使用apt-get它安装或卸载时都会显示一条消息packages have unmet dependencies
The following packages have unmet dependencies:
cups : Depends: libcups2 (= 1.7.5-3ubuntu3.2) but 2.0.2-1ubuntu3.2 is to be installed
cups-core-drivers : Depends: libcups2 (= 1.7.5-3ubuntu3.2) but 2.0.2-1ubuntu3.2 is to be installed
cups-daemon : Depends: libcups2 (= 1.7.5-3ubuntu3.2) but 2.0.2-1ubuntu3.2 is to be installed
dmsetup : Depends: libdevmapper1.02.1 (>= 2:1.02.90) but 2:1.02.77-6ubuntu2 is to be installed
libcupsmime1 : Depends: libcups2 (= 1.7.5-3ubuntu3.2) but 2.0.2-1ubuntu3.2 is to be …