在安装软件包时如果出现Could not get lock /var/lib/dpkg/lock-frontend，说明之前使用apt时出现异常，没有正常关闭，还在运行。
gj@lgj-Lenovo-G470:~$ sudo apt-get install alien
[sudo] password for lgj:
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?
解决，使用ps 和 grep查找apt的pid,并使用kill杀死掉。
lgj@lgj-Lenovo-G470:~$ ps afx|grep apt
16214 ? S 0:00 \_ sudo apt install rpm
16215 ? S 0:01 | \_ apt install rpm
16721 pts/3 S+ 0:00 \_ grep --color=auto apt
lgj@lgj-Lenovo-G470:~$ kill 16214
bash: kill: (16214) - Operation not permitted
lgj@lgj-Lenovo-G470:~$ sudo kill 16214
lgj@lgj-Lenovo-G470:~$ sudo kill 16215
执行安装指令
lgj@lgj-Lenovo-G470:~$ sudo apt-get install alien
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?
如果仍然出现，需要手动删除 /var/lib/dpkg/lock即可。
lgj@lgj-Lenovo-G470:~$ rm -rf /var/lib/dpkg/lock
ubuntu ：Could not get lock /var/lib/dpkg/lock-frontend解决
原文：https://www.cnblogs.com/weiyangchen/p/14772901.html