我正在尝试在 Ubuntu 14.04（64 位）上安装ubuntu-device-flash。我按照说明进行操作这里：准备你的 Ubuntu 桌面
我愿意：
sudo add-apt-repository ppa:ubuntu-sdk-team/ppa
sudo add-apt-repository ppa:phablet-team/tools
sudo apt-get update
sudo apt-get upgrade
sudo apt-get dist-upgrade
...最后sudo apt-get install ubuntu-device-flash
给出
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:
The following packages have unmet dependencies:
ubuntu-device-flash : Depends: click-ubuntu-policy but it is not installable
Depends: ubuntu-snappy-cli but it is not installable
E: Unable to correct problems, you have held broken packages.
为了安装成功，必须做什么？
答案1
添加这个 ppa：
sudo add-apt-repository ppa:snappy-dev/tools
更新（感谢 Joaquin）：
sudo apt-get update
然后再次尝试安装：
sudo apt-get install ubuntu-device-flash