USTC Open Source Software Mirror
The USTC Open Source Software Mirror, operated by the campus Linux User Group (LUG @ USTC), is one of the largest open source software mirror services among universities in mainland China, hosting Debian, Ubuntu, Fedora, Arch Linux, CentOS and many other distributions. It is consumed over standard package-manager protocols (HTTP/HTTPS/rsync) rather than a formally documented REST API; configuration help and a public status page are provided.