ubuntu 16.04 An error occurred during the signature verification. The repository is not updated and

今天在使用：

sudo apt-get update

出現了下面的錯誤：

W: An error occurred during the signature verification. The repository 
is not updated and the previous index files will be used

解決方法

sudo apt-get clean  
cd /var/lib/apt 
sudo mv lists lists.old 
sudo mkdir -p lists/partial 
sudo apt-get clean 
sudo apt-get update

參考文獻

[1].ubuntu下error occurred during the signature verification 解決辦法. https://blog.csdn.net/somehow1002/article/details/79638346