# deb http://mirrors.ustc.edu.cn/ubuntu/ bionic           main restricted universe multiverse
# deb http://mirrors.ustc.edu.cn/ubuntu/ bionic-security  main restricted universe multiverse
# deb http://mirrors.ustc.edu.cn/ubuntu/ bionic-updates   main restricted universe multiverse
# deb http://mirrors.ustc.edu.cn/ubuntu/ bionic-proposed  main restricted universe multiverse
# deb http://mirrors.ustc.edu.cn/ubuntu/ bionic-backports main restricted universe multiverse

# deb-src http://mirrors.ustc.edu.cn/ubuntu/ bionic           main restricted universe multiverse
# deb-src http://mirrors.ustc.edu.cn/ubuntu/ bionic-security  main restricted universe multiverse
# deb-src http://mirrors.ustc.edu.cn/ubuntu/ bionic-updates   main restricted universe multiverse
# deb-src http://mirrors.ustc.edu.cn/ubuntu/ bionic-proposed  main restricted universe multiverse
# deb-src http://mirrors.ustc.edu.cn/ubuntu/ bionic-backports main restricted universe multiverse


# 阿里云
# http://mirrors.aliyun.com

# 中科大
# http://mirrors.ustc.edu.cn

# 清华
# http://mirrors.tuna.tsinghua.edu.cn

# 163
# http://mirrors.163.com

# 默认注释了源码镜像以提高 apt update 速度，如有需要可自行取消注释
deb       [trusted=yes] http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic           main restricted universe multiverse
# deb-src [trusted=yes] http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic           main restricted universe multiverse
deb       [trusted=yes] http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-updates   main restricted universe multiverse
# deb-src [trusted=yes] http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-updates   main restricted universe multiverse
deb       [trusted=yes] http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-backports main restricted universe multiverse
# deb-src [trusted=yes] http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-backports main restricted universe multiverse
deb       [trusted=yes] http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-security  main restricted universe multiverse
# deb-src [trusted=yes] http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-security  main restricted universe multiverse

# 预发布软件源，不建议启用
deb       [trusted=yes] http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-proposed  main restricted universe multiverse
# deb-src [trusted=yes] http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-proposed  main restricted universe multiverse

