리눅스 파이썬 버전업

-파이썬버전업

sudo apt-get update

sudo apt-get install -y python3.9

sudo update-alternatives --install /usr/bin/python3 python3 /usr/bin/python3.9 2

(update-alternatives --config python3)

sudo apt install -y python3-pip python3.9-distutils (pip설치)