livecd-rootfs/live-build/cidata/user-data.sample

#cloud-config

# NB! This is a sample, copy to "user-data" and modify to take effect

# NB! meta-data is required too! See "meta-data.sample"

# NB! For networking see "network-config.sample"

# This is the user-data configuration file for cloud-init. This image
# has a default nocloud-net metadata available on the first
# partition. By default it sets up an initial user called "ubuntu"
# with password "ubuntu", which must be changed at first
# login. However, one can override and provide many additional actions
# to be initiated on first boot from this file. The cloud-init
# documentation has more details: https://cloudinit.readthedocs.io/
# Some additional examples are provided in comments below the default
# configuration.

# On first boot, set the (default) ubuntu user's password to "ubuntu" and
# expire user passwords
#chpasswd:
#  expire: true
#  list:
#  - ubuntu:ubuntu

# Enable password authentication with the SSH daemon
#ssh_pwauth: true

## On first boot, use ssh-import-id to give the specific users SSH access to
## the default user
#ssh_import_id:
#- lp:my_launchpad_username
#- gh:my_github_username

## Add users and groups to the system, and import keys with the ssh-import-id
## utility
#groups:
#- robot: [robot]
#- robotics: [robot]
#
#users:
#- default
#- name: robot
#  gecos: Mr. Robot
#  primary_group: robot
#  groups: users
#  ssh_import_id: foobar
#  lock_passwd: false
#  passwd: $5$hkui88$nvZgIle31cNpryjRfO9uArF7DYiBcWEnjqq7L1AQNN3

## Update apt database and upgrade packages on first boot
#package_update: true
#package_upgrade: true

## Install additional packages on first boot
#packages:
#- pwgen
#- pastebinit
#- [libpython2.7, 2.7.3-0ubuntu3.1]

## Write arbitrary files to the file-system (including binaries!)
#write_files:
#- path: /etc/default/keyboard
#  content: |
#    # KEYBOARD configuration file
#    # Consult the keyboard(5) manual page.
#    XKBMODEL="pc105"
#    XKBLAYOUT="gb"
#    XKBVARIANT=""
#    XKBOPTIONS="ctrl: nocaps"
#  permissions: '0644'
#  owner: root:root
#- encoding: gzip
#  path: /usr/bin/hello
#  content: !!binary |
#    H4sIAIDb/U8C/1NW1E/KzNMvzuBKTc7IV8hIzcnJVyjPL8pJ4QIA6N+MVxsAAAA=
#  owner: root:root
#  permissions: '0755'

## Run arbitrary commands at rc.local like time
#runcmd:
#- [ ls, -l, / ]
#- [ sh, -xc, "echo $(date) ': hello world!'" ]
#- [ wget, "http://ubuntu.com", -O, /run/mydir/index.html ]