[SOLVED] Overclock raspberry pi with ubuntu mate

Hello everyone, I would like to overclock my rasp. I installed the latest version of ubuntu mate and if I try to access the config file does not make me go beyond the forty-line, so I can not change it from that file. how can I do? thanks

@cavve Here is a comprehensive guide to overclocking the Pi 2.

On Ubuntu MATE try to modify the file /boot/firmware/config.txt instead of the /boot/config.txt .