Recently,I try to use apt-mirror to build a local ubuntu repository, because my storage is limited, I want it to be compatible with the specified version (16.04/18.04/20.04), but after it took me a long time to sync, but I found that only 20.04.4 systems can use it (not even 20.04.2 !).
Below is the configuration file
root@ubuntu:~# cat /etc/apt/mirror.list
############# config ##################
#
# set base_path /var/spool/apt-mirror
set base_path /opt/apt-mirror/mirror
#
# set mirror_path $base_path/mirror
# set skel_path $base_path/skel
# set var_path $base_path/var
# set cleanscript $var_path/clean.sh
# set defaultarch <running host architecture>
set defaultarch amd64
# set postmirror_script $var_path/postmirror.sh
# set run_postmirror 0
set nthreads 20
set _tilde 0
#
############# end config ##############
#deb http://cn.archive.ubuntu.com/ubuntu artful main restricted universe multiverse
#deb http://cn.archive.ubuntu.com/ubuntu artful-security main restricted universe multiverse
#deb http://cn.archive.ubuntu.com/ubuntu artful-updates main restricted universe multiverse
#deb http://archive.ubuntu.com/ubuntu artful-proposed main restricted universe multiverse
#deb http://archive.ubuntu.com/ubuntu artful-backports main restricted universe multiverse
#deb-src http://archive.ubuntu.com/ubuntu artful main restricted universe multiverse
#deb-src http://archive.ubuntu.com/ubuntu artful-security main restricted universe multiverse
#deb-src http://archive.ubuntu.com/ubuntu artful-updates main restricted universe multiverse
#deb-src http://archive.ubuntu.com/ubuntu artful-proposed main restricted universe multiverse
#deb-src http://archive.ubuntu.com/ubuntu artful-backports main restricted universe multiverse
deb-amd64 http://mirrors.bfsu.edu.cn/ubuntu/ focal main restricted universe multiverse
# deb-src https://mirrors.bfsu.edu.cn/ubuntu/ focal main restricted universe multiverse
deb-amd64 http://mirrors.bfsu.edu.cn/ubuntu/ focal-updates main restricted universe multiverse
# deb-src https://mirrors.bfsu.edu.cn/ubuntu/ focal-updates main restricted universe multiverse
deb-amd64 http://mirrors.bfsu.edu.cn/ubuntu/ focal-backports main restricted universe multiverse
# deb-src https://mirrors.bfsu.edu.cn/ubuntu/ focal-backports main restricted universe multiverse
deb-amd64 http://mirrors.bfsu.edu.cn/ubuntu/ focal-security main restricted universe multiverse
# deb-src https://mirrors.bfsu.edu.cn/ubuntu/ focal-security main restricted universe multiverse
clean http://archive.ubuntu.com/ubuntu
In order to shorten the sync time, I was going to sync the 20.04 repositories first to put it into use first, but it didn't do what I wanted.
Can someone help me?
