How to make USB memory to install Ubuntu?

1. Download ISO image

https://ubuntu.com/#download

http://mirror.kakao.com

http://ftp.kaist.ac.kr

 

2. Download Rufus

http://rufus.akeo.ie/

 

3. Run Rufus

4. Select ISO image

 

5. Click "Extra file download related to Syslinux: Yes"

 

6. Choose "Write ISO image mode: Okay"

 

7. Start