This is How you root your Samsung Galaxy Note-1, please check your model number before downloading the respective Recovery files.
A custom recovery lets you flash custom roms, root your device and flash latest android operating systems on your device/
Read further for more info.
The above video shows you how to flash a custom recovery on the galaxy note-3.
The process of flashing a recovery on the Note-1 is exactly similar , so follow these steps can you’ll be good to go.
Download CWM Recovery (For GT-N7000)
Download CWM Recovery (For AT&T Galaxy Note SGH-i717)
Watch the above video,it will guide you to root it,the above video uses Note-3,but you can follow same steps using Note-1 recovery.
Please Follow the Instructions carefully!
Download ODIN Download & Unzip