ubuntu 安装 mono报错 E: Unable to correct problems, you have held broken packages.
目录1.更新源2.安装mono2.1.安装必要软件包2.2.导入源仓库的GPGkey2.3.添加Mono源仓库到系统源2.4.安装mono系统:ubuntu16.04由于mono版本较低,需要重新安装mono。当重新安装mono时,出现如下报错Thefollowingpackageshaveunmetdependencies:mono-complete:Depends:mono-runtime(=