刚装好系统，想安装一个软件，居然报错，提示其他人正在安装。
abhisheknuc:~$ sudo apt install grub-customizer
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), i
