sudo nano /etc/apt/sources.list
如下内容直接替换
deb https://mirrors.aliyun.com/ubuntu-ports/ mantic main restricted universe multiverse
deb-src https://mirrors.aliyun.com/ubuntu-ports/ mantic main restricted universe multiverse
deb https://mirrors.aliyun.com/ubuntu-ports/ mantic-security main restricted universe multiverse
deb-src https://mirrors.aliyun.com/ubuntu-ports/ mantic-security main restricted universe multiverse
deb https://mirrors.aliyun.com/ubuntu-ports/ mantic-updates main restricted universe multiverse
deb-src https://mirrors.aliyun.com/ubuntu-ports/ mantic-updates main restricted universe multiverse
# deb https://mirrors.aliyun.com/ubuntu-ports/ mantic-proposed main restricted universe multiverse
# deb-src https://mirrors.aliyun.com/ubuntu-ports/ mantic-proposed main restricted universe multiverse
deb https://mirrors.aliyun.com/ubuntu-ports/ mantic-backports main restricted universe multiverse
deb-src https://mirrors.aliyun.com/ubuntu-ports/ mantic-backports main restricted universe multiverse
