When I use i2cHelper.py to set I2C, error occurs, how to fixed it

[LimingGao]

====================================						Raspberry Pi I2C check				and setup tools
SunFounder

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Checking your Pi's information. Your cpu revision: a02082 Your Raspberry Pi is Revision 3 Your I2C bus number is: 1

Checking your device... I2C has not been setup.

Backup... done Setting i2c... remove_line: [Errno 13] Permission denied: '/boot/config.txt' add line: [Errno 13] Permission denied: '/boot/config.txt' done I2C has set. It would change after reboot. Do you want to reboot now?(y/n)

[LimingGao]

use sudo