1、在sudo apt-get update时，报E: Could not get lock /var/lib/apt/lists/lock - open (11: Resource temporarily unavailable)不能获得锁定。
示例如下：
$ 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/
2、在/var/lib/apt/lists下有一个残留的lock文件是这个问题的原因。
$ sudo rm /var/lib/apt/lists/lock
