The network condition in our lab is very good, in general.
However, the apt-get update is not that well.
Download speed often fluctuates in the daytime, maybe due to great amount of users.
The speed in late night is quite good, but I can't install softwares at that time.
Then, I found that I can install a mirror site of apt sources!
It will be very fast!
It's quite simple to achieve that~
First of all, you must install apt-mirror on your local machine as apt source.
# apt-get install apt-mirror
Then update the config of apt-mirror to link to a mirror sites
# vim /etc/apt/mirror.list
set base_path /apt # I mounted a disk on this path as storage
set defaultarch amd64 # Only sync 64bit data, i386 is nouse for me
set nthreads 20 # Set the threads number to speed up download
set _tilde 0 # I forget what is this config
# The mirror urls, I use tsinghua's apt mirror
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ trusty main multiverse restricted universe
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ trusty-backports main multiverse restricted universe
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ trusty-proposed main multiverse restricted universe
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ trusty-security main multiverse restricted universe
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ trusty-updates main multiverse restricted universe
Then sync! This process will take much long time to finish, you can go to sleep
# apt-mirror
Some posts from blogs say that you can config crontab to sync with apt server automatically.
I didn't config that because this is enough for me.
I can update the mirror when I want to.
Then update my Apache's config:
# vim /etc/apache2/mods-available/alias.conf
Add the following configs in <IfModule alias_module>
Alias /ubuntu /apt/mirror/mirrors.tuna.tsinghua.edu.cn/ubuntu
<Directory "/apt/mirror/mirrors.tuna.tsinghua.edu.cn/ubuntu">
Options Indexes FollowSymlinks
AllowOverride None
Require all granted
</Directory>
Restart or reload config of apache2
# /etc/init.d/apache2 reload
Then, the SERVER side is done! Left is config client machine.
Update the sources.list on client machine:
# vim /etc/apt/sources.list
Replace the origin content with the following.
Attention please replace localhost with your apt server IP or domain name
deb [arch=amd64] http://localhost/ubuntu/ trusty main multiverse restricted universe
deb [arch=amd64] http://localhost/ubuntu/ trusty-backports main multiverse restricted universe
deb [arch=amd64] http://localhost/ubuntu/ trusty-proposed main multiverse restricted universe
deb [arch=amd64] http://localhost/ubuntu/ trusty-security main multiverse restricted universe
deb [arch=amd64] http://localhost/ubuntu/ trusty-updates main multiverse restricted universe
Then Update apt
# apt-get update