deb http://mirrors.fsc.efoxconn.com/apt focal main restricted
deb http://mirrors.fsc.efoxconn.com/apt focal-updates main restricted
deb http://mirrors.fsc.efoxconn.com/apt focal universe
deb http://mirrors.fsc.efoxconn.com/apt focal-updates universe
deb http://mirrors.fsc.efoxconn.com/apt focal multiverse
deb http://mirrors.fsc.efoxconn.com/apt focal-updates multiverse
deb http://mirrors.fsc.efoxconn.com/apt focal-security main restricted
deb http://mirrors.fsc.efoxconn.com/apt focal-security universe
deb http://mirrors.fsc.efoxconn.com/apt focal-security multiverse
......
deb http://mirrors.fsc.efoxconn.com/apt focal-security multiverse
# deb-src http://mirrors.fsc.efoxconn.com/apt focal-security multiverse
# deb [arch=amd64] https://download.docker.com/linux/ubuntu focal stable
# deb-src [arch=amd64] https://download.docker.com/linux/ubuntu focal stable
Hit:1 http://mirrors.fsc.efoxconn.com/apt focal InRelease
Get:2 http://mirrors.fsc.efoxconn.com/apt focal-updates InRelease [114 kB]
Get:3 http://mirrors.fsc.efoxconn.com/apt focal-backports InRelease [108 kB]
......
Fetched 5,711 kB in 6s (1,006 kB/s)
Reading package lists... Done
Building dependency tree
Reading state information... Done
28 packages can be upgraded. Run 'apt list --upgradable' to see them.