/opt/vc/bin/vcgencmd <commands>

  ap_output_control
  ap_output_post_processing
  cache_flush
  codec_enabled
  disk_notify
  display_power
  dispmanx_list
  egl_platform_switch
  file
  force_audio
  get_camera
  get_config
  get_hvs_asserts
  get_lcd_info
  get_mem
  get_rsts
  hdmi_adjust_clock
  hdmi_channel_map
  hdmi_ntsc_freqs
  hdmi_status_show
  hdmi_stream_channels
  hvs_update_fields
  inuse_notify
  led_control
  measure_clock
  measure_temp
  measure_volts
  mem_oom
  mem_reloc_stats
  mem_validate
  memtest
  otp_dump
  pm_get_status
  pm_set_policy
  pm_show_stats
  pm_start_logging
  pm_stop_logging
  pwm_speedup
  read_ring_osc
  render_bar
  scaling_kernel
  scaling_sharpness
  schmoo
  set_backlight
  set_bus_arbiter_mode
  set_logging
  set_vll_dir
  sus_is_enabled
  sus_status
  sus_stop_test_thread
  sus_suspend
  test_result
  vchi_test_exit
  vchi_test_init
  vcos
  vctest_get
  vctest_set
  vctest_start
  vctest_stop
  version

  /opt/vc/bin/vcgencmd measure_temp