1. ifconfig -a | grep -i mtu
  2. UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
  3. UP LOOPBACK RUNNING MTU:65536 Metric:1
  4. UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1500 Metric:1
  5. UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1500 Metric:1
  6. BROADCAST MULTICAST MTU:1500 Metric:1