Like almost every Brazilian, I cook with this pressure cooker very often. The things you have to be aware is the relief valve and the safety seal.
The relief valve, on top of the pan, should be clean and move freely. That’s where the pressure will gradually escape from the cooker while you’re cooking.
The safety seal is a rubber that melts if the pressure is too high and then relief the pressure very fast. Make sure this seal is alright.
Another thing I do and recommend is to never fill the cooker with water past the middle of the cooker! You must have an empty space to build pressure! If you put too much water, the pressure will increase really fast and blow everything up. So take care about the amount of water you put and never exceed the middle of the cooker
Well, it’s possible, but I don’t think it’s feasible… If you want another distro, it’s easier if you format your pc with the distro you want