![更新时权限被拒绝](https://linux22.com/image/933007/%E6%9B%B4%E6%96%B0%E6%97%B6%E6%9D%83%E9%99%90%E8%A2%AB%E6%8B%92%E7%BB%9D.png)
每当我尝试使用更新系统时
sudo apt update && apt upgrade
我发现这个错误
E: Could not open lock file /var/lib/dpkg/lock-frontend - open (13: Permission denied)
E: Unable to acquire the dpkg frontend lock (/var/lib/dpkg/lock-frontend), are you root?
我正在使用带有 Plasma 的 Ubuntu 20.04.1 LTS x86_64