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每当我尝试使用终端安装程序时，都会收到此错误：

home@ubuntu:~$ apt-get install myunity
E: Could not open lock file /var/lib/dpkg/lock - open (13: Permission denied)
E: Unable to lock the administration directory (/var/lib/dpkg/), are you root?

我也无法使用终端安装更新。