Root Google Nexus 7

Here is how to Unlock your Nexus7 Bootloader

http://www.modaco.com/topic/359301-nexus-7-boot-unlock-method-that-works-with-android-42-and-windows8/

Download USB Driver

http://support.asus.com/download.aspx?SLanguage=en&p=20&s=&m=Nexus%207&os=&hashedid=WzTziL1xapnpDNwF

Unlock bootloader
http://www.modaco.com/topic/359301-nexus-7-boot-unlock-method-that-works-with-android-42-and-windows8/

root android
http://www.reddit.com/r/Nexus7/comments/18tn7r/how_do_i_root_nexus_7_under_linuxandroid_422/

Device not found

http://blog.dantup.com/2012/10/fixing-adb-device-not-found-with-nexus-7-in-recovery-mode