How would you work offline on a bus ( or plane, or train )? [...]

Which tools would you choose ? How would you set them up ?... Any suggestions to ease my life ( other than "change to a job closer to home" ) and make this commuting a more productive time ?

Since I've had to figure out how to do this twice now, and the NodeSource instructions make this more confusing than it ought to be. Make sure you replace node_6.x with the appropriate version from the installation instructions and xenial with the results of lsb_release -s -c.

- name: NodeSource package key
  apt_key:
    state: present
    url: https://deb.nodesource.com/gpgkey/nodesource.gpg.key
- name: NodeSource repository
  apt_repository:
    repo: 'deb https://deb.nodesource.com/node_6.x xenial main'
- name: Install NodeJS
  apt:
    state: present
    name: nodejs