nexus-5.0.1-ota-update.sh

#!/bin/bash

# make a new directory to work in
cd ~/Desktop && mkdir nexus501

# get the OTA
wget http://android.clients.google.com/packages/ota/google_hammerhead/785a2f7af3718dba7e569decde8b6c4dc476a309.signed-hammerhead-LRX22C-from-LRX21O.785a2f7a.zip
mv *.zip update.zip

# get the flashable super su
wget http://download.chainfire.eu/641/SuperSU/UPDATE-SuperSU-v2.40.zip?retrieve_file=1
mv UPDATE-SuperSU-v2.40.zip?retrieve_file=1 UPDATE-SuperSU-v2.40.zip

# get twrp
wget http://techerrata.com/file/twrp2/hammerhead/openrecovery-twrp-2.8.3.0-hammerhead.img

# get the factory image
mkdir factory_img && cd factory_img
wget https://dl.google.com/dl/android/aosp/hammerhead-lrx21o-factory-01315e08.tgz

# extract recovery.img, boot.img and system.img
tar xjf *.tgz
cd hammerhead-lrx21o
unzip image-hammerhead-lrx21o.zip
mv recovery.img ../../
mv boot.img ../../
mv system.img ../../
cd ../../
rm -r factory_img

# flash it
adb devices

adb reboot bootloader

fastboot devices

fastboot flash recovery recovery.img

fastboot flash system system.img

fastboot flash boot boot.img

adb reboot recovery

echo "wait for the android and red triangle"

echo "then press power + volume up and release"

read -p "then pick apply update from ADB [Press any key when ready]"

adb sideload update.zip

read -p "pick reboot to bootloader [Press any key when ready]"

fastboot flash recovery openrecovery-twrp-2.8.3.0-hammerhead.img

read -p "pick recovery mode and press the power button [Press any key when ready]"

read -p "you should be in twrp, press advanced -> adb sideload [Press any key when ready]"

read -p "check both options (Wipe Dalvik Cache and Wipe Cache) then swipe the bar [Press any key when ready]"

adb sideload UPDATE-SuperSU-v2.40.zip

echo "reboot and you're done"

echo "rm -r ~/Desktop/nexus501 if you're done and want to clean up"