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是否需要安装不受信任的软件包?
我昨天尝试安装VLC Player,但Requires installation of untrusted packages出现错误。我花了几个小时寻找解决此问题的方法,最后想到了一个建议,说要更改服务器以从中下载更新。我这样做了,当我在更新管理器中单击“检查”时,它给了我404错误。我尝试将服务器切换回主服务器(之后又切换到其他服务器),但现在仍然出现404错误: 还有我在下载或更新时遇到的另一个错误: 编辑:输出cat /etc/apt/sources.list: deb-src http://us.archive.ubuntu.com/ubuntu/ precise main restricted #Added by software-properties # See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to # newer versions of the distribution. deb http://us.archive.ubuntu.com/ubuntu/ precise main restricted multiverse deb-src http://us.archive.ubuntu.com/ubuntu/ precise multiverse universe #Added by software-properties ## Major bug fix updates …