解决 E: Could not get lock /var/lib/apt/lists/lock

参考：Unable to lock the administration directory (/var/lib/dpkg/) is another process using it?

在更换软件源时遇到了如下问题：

sudo apt-get update

E: Could not get lock /var/lib/apt/lists/lock - open (11: Resource temporarily unavailable)
E: Unable to lock directory /var/lib/apt/lists/

表明当前有某个进程正在apt-get，然而我并没有使用任何命令，于是需要kill掉进程。

解决方法是：

sudo rm /var/lib/apt/lists/lock

2017.3.12