I've installed Ubuntu Mate in my Raspberry Pi 3, but i can't use any ''sudo'' command.
Every time i tries to use a ''sudo'' command, the terminal request a password, i searched on the internet and looks like i need a root password, but i can't (don't know how to) create one.
I can't use any ''sudo'' command what do i do? pls help
(It's my first time using a Linux)