ubuntu server list

ubuntu

change ubuntu package server list

.1 backup// sources.list

sudo cp /etc/apt/sources.list /etc/apt/sources.list.ORG

2.edit// sources.list

sudo vi /etc/apt/sources.list

3.change
vi, tw > us

:1,$s/tw/us/g

4.save// source.list

:wq!

5.update list

sudo apt-get update