Ubuntu Update Sources list

- After install Ubuntu finish
1. Use command nano /etc/apt/sources.list Enter
2. Edit file by Ctrl+w and typing "th.archive.ubunt.com" and Ctrl+r
3. Typing "192.168.0.252:9999" Enter and typing a Enter
4. Ctrl+w and typing "security.ubuntu.com" and Ctrl+r
5. Insert data same number 3.
6. press Ctrl+x and Ctrl+y Enter
7. use command apt-get update
8. After apt-get update finish. Use command apt-get upgrade