get system uptime in ruby

main.rb
require 'subprocess'

def system_uptime
  # Execute the `uptime` command and capture its output
  output, _ = Subprocess.check_output(['uptime'])
  
  # Extract the uptime value from the output
  uptime = output.strip.split.last
  
  return uptime
end

puts system_uptime
272 chars
14 lines