If you have already had the opportunity to try out the new Android Jelly Bean 4.1 for Galaxy Nexus, through rom released a few days ago, then you have also tried to unlock the bootloader (fastboot oem unlock with the usual) and maybe even to make the root of the device . With the new Android Jelly Bean do not seem to work most of the traditional methods to obtain root permissions: so here is a simple guide to perform the root of the Galaxy Nexus with Android 4.1, tested procedure correctly on i9250 models, namely the European GSM variant .
HELP - ROOT ANDROID 4.1 GALAXY NEXUS
- Download your recovery preferred, for example the excellent ClockworkMod Touch .
 - Download JB-SuperSU.zip from one of these mirrors:
Mirror # 1 - Copy the file to the root of JB-SuperSU.zip SD Card Galaxy Nexus using the browser or simply with the command adb push JB-SuperSU.zip / sdcard /
 - Restart booloader via adb with the following command:
adb reboot bootloader 
Or Second Root Method
- to the terminal is off, hold down the volume keys and press and hold the power button until it enters the recovery.
 - Install the custom recovery using the command:
 - fastboot flash recovery recovery-clockwork-5.8.0.2-touch-maguro.img (or the name of your recovery you downloaded in step 1)
 - To ensure that the recovery remains permanently installed you must rename the file / system / recovery-from-boot.p after gaining root permissions - you have to remount / system rw permissions
 - Moved from the bootloader menu Recovery and press the button to start
 - Choose "install zip from SD-Card", and installs the JB-SuperSU.zip
 - Restart - you should see the icon uperSU
 - Try it with any program that requires root, such as Root Check or Titanium Backup
 - End We will have done well to root the Galaxy Nexus
 

