常见问题

1.Waiting for cache lock: Could not get lock /var/lib/dpkg/lock. It is held by process xxxx(dpkg)

原因解释：有的后台程序真正使用apt
解决方法：在终端中输入下面的指令

sudo killall apt apt-get

如果没起作用的话，可以尝试删除锁

sudo rm /var/lib/apt/lists/lock
sudo rm /var/cache/apt/archives/lock
sudo rm /var/lib/dpkg/lock*

然后配置

sudo dpkg --configure -a

最后更新apt

sudo apt update