This will erase all data on the device, so make a backup before you start. Also, as with all processes related to the root, there are inherent risks. Make sure you understand and are happy with them before proceeding, TECH DIGI NEWS doesn't assume any responsibility for anything that happens as a result of following the instructions below.
This tutorial will help you to Root Nexus 5 Android 5.1 Lollipop (Build number LMY47D ).
How to root Nexus 5 on Android 5.1 Lollipop
1. Make sure your phone has USB Debugging enabled in Developer Options. If you don't have this option in Settings already, go to Settings > About Phone and tap Build Number until the notification that Developer Options have been enabled pops up. Then back out a step and you'll see it at the bottom of your Settings menu.
2. Make sure you have the Nexus 5 USB Drivers installed on your PC (follow the instructions here if you don't).
3. Ensure your Nexus 5 battery is charged to at least 50 percent.
4. Open the ADB Tools folder on your PC. If you don't have it installed already, download ADB Tools here, extract the folders, go to adb-tools_driver > adb-tools_driver > adb-driver and run the 'UniversalAdvDriverSetup' install file.
5. When the installation is finished, make sure that Fastboot is in the ADB Tools folder. If it isn't, download Fastboot for Windows at the link.
6. Download SuperSU v2.46 on your PC.
7. Copy the SuperSU zip file to the root directory of your Nexus 5. To do this, connect your Nexus 5 to your PC with a USB cable and copy the file to the place where all the root folders are, but don't actually place it in a folder. (Temporarily turn off USB Debugging if your PC doesn't recognize your Nexus 5 is connected.)
8. Download ClockworkMod custom recovery to your PC and place it in the ADB Tools directory.
9. Restart your Nexus 5 in Fastboot. To do this, turn it off, then press and hold Power and Volume Down until you see the Fastboot menu. The phone should still be connected to the PC with the USB cable.
10. Open a Windows Explorer window and head to the ADB Tools folder.
11. In a blank space in the window, hold Shift and right click your mouse. Then click on Open Command Window Here.
12. Type in the following command:
fastboot flash recovery recovery-clockwork-touch-6.0.4.5-hammerhead.img
13. Use the volume keys to select Recovery Mode on your Nexus 5 and hit Power to enter it.
14. From CWM, use the volume keys to select 'install zip' and hit Power to confirm, then select 'choose zip from SD card'.
15. Locate the SuperSU zip you copied over earlier (it should appear at the bottom of the list in /sdcard/0/) and press power to confirm your selection, reconfirm and wait until you see the notification at the bottom of the screen that says 'Install from SD card complete'.
16. Back out to the main menu and reboot your Nexus 5. Make sure you tell your recovery to fix root.
17. The first boot may take a while (this is why you charged your battery) but don't freak out. Go have a cup of tea and just let the phone do its thing. Do NOT unplug your phone from your PC or winged monkeys will fly through the window and do all kinds of terrible things.
18. Once your Nexus 5 has rebooted, you'll be rooted and ready to roll with SuperSU installed. Install RootChecker from the Play Store to double check your root status and grant it superuser access. If you get a green confirmation message, you're all sorted.
19. If you get stuck in a bootloop (meaning after a long time your phone still hasn't booted up normally), you can switch it off, reboot into Fastboot, go to Recovery, wipe data, wipe the cache partition and reboot again. That should do the trick.
