Some linux distributions install nodejs not as “node” executable but as “nodejs”.
In this case you have to manually link to “node” as many packages are programmed after the “node” binary. Something similar also occurs with “python2” not linked to “python”.
In this case you can do an easy symlink. For linux distributions which install package binaries to /usr/bin you can do
ln -s /usr/bin/nodejs /usr/bin/node