sudo apt-get install indicator-ubuntuone
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package indicator-ubuntuone 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 'indicator-ubuntuone' has no installation candidate
我甚至尝试了“ubuntuone-indicator”，但也没有用。
答案1
你必须添加第三方存储库用于安装 UbuntuOne-指标，按照这些命令
sudo add-apt-repository ppa:rye/ubuntuone-extras
sudo apt-get update && sudo apt-get install indicator-ubuntuone
注销并登录以查看指标。
编辑：如果您已经添加了存储库，请尝试从软件源 （参见图片）并在终端中执行sudo apt-get update && sudo apt-get upgrade，然后尝试再次安装
