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# Generate the now preferred Ed25519 key
ssh-keygen -t ed25519

# Search in known_hosts file
ssh-keygen -F "hostname"

# Remove key(s) from known_hosts file
ssh-keygen -R "hostname"

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opts = {
  indent: '  ',
  space: ' ',
  object_nl: "\n",
  array_nl: "\n"
}
JSON.fast_generate(obj, opts)

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Slack OAuth for Bot App

1. Autorization

Open in a web browser: https://slack.com/oauth/authorize?scope=bot&client_id=12345.67890

• Use Client ID from App Credentials.
• Use bot for scope.

2. Authorization Code

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Google OAuth for Service Accounts/Firebase REST How-to

Firebase REST queries require access_token parameter for full access. This is Google’s OAuth 2.0 for service accounts.

• https://firebase.google.com/docs/reference/rest/database/user-auth
• https://developers.google.com/identity/protocols/OAuth2ServiceAccount

Get credentials of the service account

• Firebase Console > Settings > Project settings > Service accounts tab

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def load_from_path(path)
  Dir.chdir(path) {
    Dir.foreach('.') { |f| load f unless File.directory?(f) }
  }
end

paths = [
  'conf.d',
  'plugins'
]

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# Convert all Hash keys to lowercase symbols
# @param obj [Object] any Ruby object
def keys_to_sym(obj)
  case obj
  when Array
    obj.each do |v|
      keys_to_sym(v)
    end
  when Hash
    obj.keys.each do |k|

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# See: https://rvm.io/rvm/install

# Install public key
gpg --keyserver hkp://keys.gnupg.net --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3

# Single-user install
\curl -sSL https://get.rvm.io | bash -s stable --ruby

# Multi-user install; after install, add users to "rvm" group
\curl -sSL https://get.rvm.io | sudo bash -s stable

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redis-cli KEYS "Sidekiq:*:stat:processed:*" | xargs -n 100 redis-cli DEL

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1.0.0 / Unreleased

Added

• Version followed by release date.
• Maintain "Unreleased" version in draft in preparation for release.
• "Added" section for new features added.
• MAJOR increment in semantic versioning would mean incompatible changes.

Changed

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Slack Message Formatting Reference

Text Formatting

Basic Styles

Making a *bold statement.*
Emphasis with _italic text._
Let's ~strike out~ post this message.