How to setup ubuntu mirror page

For faster apt update, you’ll need mirror page, close to your own location. setup can be done as follows.

1. file is in /etc/apt/sources.list. Open it by:

   $ sudo vi /etc/apt/sources.list
   

2. substitute. For me, i am in korea, so kr.archive.ubuntu.com -> mirror.kakao.com. and in vi command,

   :%s/A/B 
   

   substitutes A into B. so for my case,

   :%s/kr.archive.ubuntu.com/mirror.kakao.com
   

3. apply by

   sudo apt get update
   

Done!