Connect over SSH without having to remember domains or IP addresses

connect.rb

#!/usr/bin/env ruby

# Connect
#
# Quickly SSH into a server or get its details without
# having to remember IP addresses or domain names.
#
# SETUP
# -----
# Fill out the following:
#   `DEFAULT_USERNAME` - The username so ssh with if none is specified in the command
#   `hosts` - An array of host hashes where each has a name, IP, and description. Follow the example in the code.
# Put this script somewhere in your path like /usr/local/bin and make sure it's executable (`mv connect.rb /usr/local/bin/connect && chmod +x /usr/local/bin/connect`
#
# Usage: Run `connect <hostname> <user>`
#   <user> is optional and defaults to '<REPLACE WITH YOUR OWN DEFAULT>'
# List: `connect list`
#   Lists the hostname, IP, and description for each host.

##
# EDIT YOUR USERNAME
##
DEFAULT_USER = 'CHANGE_ME'

if ARGV[0].nil?
  puts <<-END
Please specify a hostname. USAGE:
connect <host> <username> - Username is optional
  END
  exit 1
end

command      = ARGV[0] == 'list' ? 'list' : 'connect'
host         = ARGV[0]
user         = ARGV[1].nil? ? DEFAULT_USER : ARGV[1] # REPLACE 'user' with your preferred default username

##
# ADD YOUR HOSTS HERE
##
hosts = [
  {
    name: 'portland',
    ip: '10.0.0.123',
    description: 'Portland potentiometer driven synth',
    user: user
  },
  {
    name: 'olympic',
    ip: '10.0.0.167',
    description: 'A Raspberry Pi 4 B with undetermined use',
    user: user
  }
]

##
# NOTHING ELSE TO EDIT
##
if command == 'connect'
  command_str = ''
  hosts.each do |h|
    if h[:name] == host
      command_str = "ssh #{h[:user]}@#{h[:ip]}"
    end
  end
  puts "Connecting #{user} to #{host}..."

  system(command_str)
else
  hosts.each do |host|
    hostname = host[:name].rjust(15)
    ip       = host[:ip].rjust(15)
    desc     = host[:description]
    puts "#{hostname} | #{ip} | #{desc}"
  end
end