sudo apt-get update 出错 sudo apt-get update 出错 Updating from such a repository can‘t be done securely, and is therefore sudo apt-get update 出错 Updating from such a repository can‘t be done securely, and is therefore 进入到文件保存位置，进行处理就好了 cd /etc/apt/sources.list.d 之后再进行update，就正常了 sudo apt-get update 出错 Updating from such a repository can‘t be done securely, and is therefore
