Ubuntu is a Linux distribution, it is just a piece of software (an operation system) , on it's own -- it can't mine anything, let alone BTC.
So what is the hardware you got? if it is not an ASIC then it won't be able to feasibly mine BTC, if it is an ASIC then all ASIC miners come equipped with an operating system.
I have a intelcore i7 with a rtx 2060ti, its good?
NOT to directly mine bitcoin.
You can rent it for about 10 or 20 cents a day at nicehash and get paid in bitcoin. you will likely lose money. you should post in the alt coin section.
https://bitcointalk.org/index.php?board=160.0you could ask the mods to move it to alt coins.