Comment 6 for bug 490265

If you're still at the LiveCD environment the files will be in /var/log/

If you've had just installed the System the files will be in /var/log/installer

Click Add a comment/attachment at the bottom of the bug webpage.

Clicking Browse will open a file browser in your ubuntu home directory. Click on the disk icon to get to the base of the file system and then the var and log folders to get to /var/log.