amaury@amaury-M15x:~$ npm
/usr/bin/env: ‘node’: No such file or directory
amaury@amaury-M15x:~$ apt-cache policy npm
npm:
  Installed: 3.5.2-0ubuntu4
  Candidate: 3.5.2-0ubuntu4
  Version table:
 *** 3.5.2-0ubuntu4 500
        500 http://ru.archive.ubuntu.com/ubuntu xenial/universe amd64 Packages
        500 http://ru.archive.ubuntu.com/ubuntu xenial/universe i386 Packages
        100 /var/lib/dpkg/status
amaury@amaury-M15x:~$