遇到 E: Unable to acquire the dpkg frontend lock 這麼辦！！！

有時在使用 sudo  apt-get install 命令安裝軟件時，可能報錯如下：
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?

可以用如下命令試着刪除鎖定文件：

sudo rm /var/lib/dpkg/lock-frontend    
sudo rm /var/lib/dpkg/lock