Install iftop

[Matt]

Monitor the Interface Bandwidth usage.


This is installed into the following directory:

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root@nas:/opt/sbin# ls
iftop

Working, but not seeing eth0:

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root@nas:/opt/sbin# ./iftop
interface: eth0
Unable to get IP address for interface: eth0
ioctl(SIOCGIFADDR): Cannot assign requested address
MAC address is: 00:d0:b8:15:bf:dd
pcap_open_live(eth0): eth0: That device is not up
You can specify the interface to listen on:

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root@nas:/opt/sbin# ifconfig
eth1      Link encap:Ethernet  HWaddr 00:d0:b8:15:bf:dd 
          inet addr:192.168.0.2  Bcast:192.168.0.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:191293470 errors:0 dropped:0 overruns:0 frame:0
          TX packets:127492945 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:532
          RX bytes:3762986736 (3.5 GiB)  TX bytes:2605101512 (2.4 GiB)
          Interrupt:15

lo        Link encap:Local Loopback 
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:2440031 errors:0 dropped:0 overruns:0 frame:0
          TX packets:2440031 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:683505235 (651.8 MiB)  TX bytes:683505235 (651.8 MiB)

So we want eth1

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root@nas:/opt/sbin# ./iftop -i eth1
interface: eth1
IP address is: 192.168.0.2
MAC address is: 00:d0:b8:15:bf:dd

Now, I like to have an alias for this:

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root@nas:/# vim .bash_aliases


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lias iftop="/opt/sbin/iftop -i eth1"

Activate the new alias

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root@nas:/# . .bash_aliases
root@nas:/#