eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.21.99  netmask 255.255.0.0  broadcast 192.168.255.255
        ether 52:54:00:80:ba:4a  txqueuelen 1000  (Ethernet)
        RX packets 3709106  bytes 732486357 (698.5 MiB)
        RX errors 0  dropped 180  overruns 0  frame 0
        TX packets 4645294  bytes 5341553883 (4.9 GiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 651  bytes 64004 (62.5 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 651  bytes 64004 (62.5 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

