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Linux Common

A simple playbook to secure your server, prep your users, and prepare your server for other uses.

Requirements

For now, this project focuses on supporting Ubuntu 22.04 only. Choose any host that you'd like. All this role needs is an SSH connection to a user that has sudo privileges.

Role Variables

You can find all variables organized and documented in defaults/main.yml. Feel free to override any variable of your choice.

---
###########################################
# Basic Server Configuration
###########################################
server_timezone: "Etc/UTC"
server_contact: [email protected]

# SSH
server_ssh_port: "22"

## Email Notifications
postfix_hostname: "{{ inventory_hostname }}"

## Set variables below to enable external SMTP relay
# postfix_relayhost: "smtp.example.com"
# postfix_relayhost_port: "587"
# postfix_relayhost_username: "myusername"
# postfix_relayhost_password: "mysupersecretpassword"

###########################################
# APT Configuration
###########################################

# Time is in seconds (default: 24 hours)
apt_cache_expiration: 86400

# Common packages to install
common_installed_packages:
  - cron
  - curl
  - figlet
  - fail2ban
  - git
  - htop
  - logrotate
  - mailutils
  - ncdu
  - ntp
  - python3-minimal
  - ssh
  - tzdata
  - ufw
  - unattended-upgrades
  - unzip
  - wget
  - zip

# APT - Automatic Update Configuration
apt_periodic_update_package_lists: "1"
apt_periodic_download_upgradeable_packages: "1"
apt_periodic_autoclean_interval: "7"
apt_periodic_unattended_upgrade: "1"

###########################################
# Fun Terminal Customizations
###########################################
motd_header_text: "ServerSideUp"
motd_header_text_color: '\e[38;5;255m'
motd_header_background_color: '\e[48;5;34m'
motd_hostname_text_color: '\e[38;5;202m'
motd_services:
  - ufw
  - fail2ban
  - postfix

##############################################################
# Users
##############################################################

### Use the template below to set users and their authorized keys
## Passwords must be set with an encrypted hash. To do this, see the Ansible FAQ
## https://docs.ansible.com/ansible/latest/reference_appendices/faq.html#how-do-i-generate-encrypted-passwords-for-the-user-module

# users:
#   - username: alice
#     name: Alice Smith
#     state: present
#     groups: ['adm','sudo']
#     password: "$6$mysecretsalt$qJbapG68nyRab3gxvKWPUcs2g3t0oMHSHMnSKecYNpSi3CuZm.GbBqXO8BE6EI6P1JUefhA0qvD7b5LSh./PU1"
#     shell: "/bin/bash"
#     authorized_keys:
#       - public_key: "ssh-ed25519 AAAAC3NzaC1lmyfakeublickeyMVIzwQXBzxxD9b8Erd1FKVvu alice"

#   - username: bob
#     name: Bob Smith
#     state: present
#     password: "$6$mysecretsalt$qJbapG68nyRab3gxvKWPUcs2g3t0oMHSHMnSKecYNpSi3CuZm.GbBqXO8BE6EI6P1JUefhA0qvD7b5LSh./PU1"
#     groups: ['adm','sudo']
#     shell: "/bin/bash"
#     authorized_keys:
#       - public_key: "ssh-ed25519 AAAAC3NzaC1anotherfakekeyIMVIzwQXBzxxD9b8Erd1FKVvu bob"

### Additional users
## You can also set additional users (great if you're working with contractors or clients on certain groups of servers)
## These users will be flattened into the users list (if you set any settings below)

# additional_users:
#   - username: charlie
#     name: Charlie Smith
#     state: present
#     groups: ['adm','sudo']
#     password: "$6$mysecretsalt$qJbapG68nyRab3gxvKWPUcs2g3t0oMHSHMnSKecYNpSi3CuZm.GbBqXO8BE6EI6P1JUefhA0qvD7b5LSh./PU1"
#     shell: "/bin/bash"
#     authorized_keys:
#       - public_key: "ssh-ed25519 AAAAC3NzaC1lmyfakeublickeyMVIzwQXBzxxD9b8Erd1FKVvu alice"

#   - username: dana
#     name: Dana Smith
#     state: present
#     password: "$6$mysecretsalt$qJbapG68nyRab3gxvKWPUcs2g3t0oMHSHMnSKecYNpSi3CuZm.GbBqXO8BE6EI6P1JUefhA0qvD7b5LSh./PU1"
#     groups: ['adm','sudo']
#     shell: "/bin/bash"
#     authorized_keys:
#       - public_key: "ssh-ed25519 AAAAC3NzaC1anotherfakekeyIMVIzwQXBzxxD9b8Erd1FKVvu bob"

Dependencies

See requirements.yml for all collection dependencies.

To install all dependencies, run:

ansible-galaxy install -r requirements.yml

Example Playbook

Including an example of how to use your role (for instance, with variables passed in as parameters) is always nice for users too:

- hosts: servers
  roles:
     - { role: serversideup.linux_common, server_timezone: 'America/Chicago' }