ubuntu 20

cd ~
curl -sL https://deb.nodesource.com/setup_14.x -o setup_14.sh
sudo sh ./setup_14.sh
sudo apt update
sudo apt install nodejs
node -v
#v14.18.1

centos7

sudo dnf module list nodejs
dnf module reset  nodejs
sudo dnf module enable nodejs:14
dnf install nodejs
node --version
#v14.17.5