Instale tar.xz en ubuntu
$ tar xvfJ fich.tar.xz
elcharitas
$ tar xvfJ fich.tar.xz
//cd to downloaded directory
$ tar xvfJ node.tar.xz
//then
sudo cp -r node-v14.15.5-linux-x64/{bin,include,lib,share} /usr/
tar -xf [file].tar.xz
cd [file]
./configure
make
sudo make installtar xf [filename]
This will expand the contents of the file to a folder. Then the commands are, from the folder:
./configure
make
sudo make install