View Interface connection status in linux

View Interface connection status in linux
Ethtool # ethtool em1Settings for em1: Supported ports: [TP] Supported link modes: 10 baseT/Half 10 baseT/Full 100 baseT/Half 100 baseT/Full 1000 baseT/Half 1000 baseT/Full Supports auto-negotiation: Yes Advertised link modes: 10 baseT/Half 10 baseT/Full 100 baseT/Half 100 baseT/Full 1000 baseT/Half 1000 baseT/Full Advertised pause frame use: Invalid Ric Advertised auto-negotiation: Yes Link partner advertised Link modes: 10 baseT/Half 10 baseT/Full 100 baseT/Half 100 baseT/Full 1000 baseT/Full Link partner advertised pause frame use: No Link partner advertised auto-negotiation: yes Speed: 1000 Mb/s Duplex: Full Port: Twisted Pair PHYAD: 1 Transceiver: internal Auto-negotiation: on MDI-X: off Supports Wake-on: g Wake-on: d Current message level: 0x000000ff (255) Link detected: yes # ethtool em2Settings for em2: Supported ports: [TP] Supported link modes: 10 baseT/Half 10 baseT/Full 100 baseT/Half 100 baseT/Full 1000 baseT/Half 1000 baseT/Full Supports auto-negotiation: yes Advertised link modes: 10 baseT/Half 10 baseT/Full 100 baseT/Half 100 baseT/Full 1000 baseT/Half 1000 baseT/Full Advertised pause frame use: Your Ric Advertised auto-negotiation: yes Speed: Unknown! Duplex: Unknown! (255) Port: Twisted Pair PHYAD: 2 Transceiver: internal Auto-negotiation: on MDI-X: Unknown Supports Wake-on: g Wake-on: d Current message level: 0x000000ff (255) link detected: no network #/etc/init. d/network statusConfigured devices: lo em1 em2 em3 em4 p3p1 p3p2Currently active devices: lo em1 port0 port1 vlan1 dummy1