lock-frontend - open (11: Resource temporarily unavailable) E: U

E: Could not get lock /var/lib/dpkg/lock-frontend - open (11: Resource temporarily unavailable)
E: Unable to acquire the dpkg frontend lock (/var/lib/dpkg/lock-frontend), is another process using it?
问题：

解决方案：
1、ps afx|grep apt
执行这个命令查看apt的进程，如图中apt进程号为3089 E: Could not get lock /var/lib/dpkg/lock-frontend - open (11: Resource temporarily unavailable) E: U
2、kill -9 3089
执行上述命令将进程杀死

3、sudo rm /var/lib/dpkg/lock-frontend
sudo rm /var/lib/dpkg/lock
执行上面两个将其删除。

4、成功使用apt下载安装

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