Types: deb #URIs: http://archive.ubuntu.com/ubuntu/ URIs: http://mirrors.ustc.edu.cn/ubuntu/ Suites: noble noble-updates noble-backports Components: main restricted universe multiverse Signed-By: /usr/share/keyrings/ubuntu-archive-keyring.gpg #Types: deb #URIs: http://security.ubuntu.com/ubuntu/ #Suites: noble-security #Components: main restricted universe multiverse #Signed-By: /usr/share/keyrings/ubuntu-archive-keyring.gpg