我想安装一些应用程序，但任何安装命令都说这个包has no installation candidate。我甚至无法运行sudo apt-get update。
cookie98@cookie98**:~$ sudo apt-get install software-properties-common
[sudo] password for cookie98:
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package software-properties-common is not available, but is
referred to by another package.
This may mean that the package is missing, has been obsoleted, or is
only available from another source
E: Package 'software-properties-common' has no installation candidate
`
答案1
当我遇到“无安装候选项”问题（但安装不同）时，问题出在我的/etc/apt/sources.list。检查您的 可能会有所帮助
deb http://archive.ubuntu.com/ubuntu/ trusty main restricted universe multiverse
deb http://archive.ubuntu.com/ubuntu/ trusty-security main restricted universe multiverse
deb http://archive.ubuntu.com/ubuntu/ trusty-updates main restricted universe multiverse
deb http://archive.ubuntu.com/ubuntu/ trusty-proposed main restricted universe multiverse
deb http://archive.ubuntu.com/ubuntu/ trusty-backports main restricted universe multiverse