无法获得锁 /var/lib/dpkg/lock - open (11: 资源临时不可用)

jiawenqi@ubuntu:~$ sudo apt-get install pip
[sudo] password for jiawenqi:
E: Could not get lock /var/lib/dpkg/lock - open (11: Resource temporarily unavailable)
E: Unable to lock the administration directory (/var/lib/dpkg/), is another process using it?
若出现上述错误，其实这是因为有另外一个程序在运行，导致锁不可用。原因可能是上次运行更新或安装没有正常完成。解决办法是杀死此进程
sudo rm /var/cache/apt/archives/lock
sudo rm /var/lib/dpkg/lock