Sometimes I get curious about how much data a network interface has transferred. Actually, I get curious quite frequently after I got an LTE modem for my laptop.

Usually, I just use ifconfig:

$ ifconfig wlp3s0
wlp3s0    Link encap:Ethernet  HWaddr 00:15:00:7e:af:bd  
          inet addr:  Bcast:  Mask:
          inet6 addr: fe80::4c15:ef76:132e:768/64 Scope:Link
          RX packets:20922893 errors:0 dropped:0 overruns:0 frame:0
          TX packets:20916831 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:15370202859 (15.3 GB)  TX bytes:13050802316 (13.0 GB)

With Ubuntu 18.04, however, there is no ifconfig. Yes, I know I can install it, but I wanted to learn how I should be doing it.

I came up with this, using the ‘ip’ command:

$ ip -s -h addr show wlp3s0
3: wlp3s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
    link/ether 00:15:00:7e:af:bd brd ff:ff:ff:ff:ff:ff
    inet brd scope global dynamic wlp3s0
       valid_lft 5439sec preferred_lft 5439sec
    inet6 fe80::4c15:ef76:132e:768/64 scope link 
       valid_lft forever preferred_lft forever
    RX: bytes  packets  errors  dropped overrun mcast   
    15.4G      20.9M    0       0       0       0       
    TX: bytes  packets  errors  dropped carrier collsns 
    13.1G      20.9M    0       0       0       0

Meh. This is gonna take some time to get used to.