Upgrading Ubuntu 17.10 (Artful Aardvark) - installation

1. Prepare
 > backup - pass
 > turn on addition cooler pan - not necessary

2. Popup Upgrade Message

3. File downloading, installation, clean up
  > it takes time, if network bandwidth and computer CPU fast enought, it will take at least 30 minute.
  > downloading packages

  > installing files