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| deb-src http://mirrors.aliyun.com/ubuntu/ focal main restricted universe multiverse | |
| deb http://mirrors.aliyun.com/ubuntu/ focal-security main restricted universe multiverse | |
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| deb http://mirrors.aliyun.com/ubuntu/ focal-updates main restricted universe multiverse | |
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| deb http://mirrors.aliyun.com/ubuntu/ focal-backports main restricted universe multiverse | |
| deb-src http://mirrors.aliyun.com/ubuntu/ focal-backports main restricted universe multiverse | |
| deb http://mirrors.aliyun.com/ubuntu/ focal-proposed main restricted universe multiverse | |
| deb-src http://mirrors.aliyun.com/ubuntu/ focal-proposed main restricted universe multiverse |