Network traffic, disk speed monitoring, network connection disk speed, wifi, wlan, iperf - test connection, iostat, iotop

Network monitoring

iftop - shows horisontal bars of transfers
http://ex-parrot.com/~pdw/iftop/

iptraf - shows statistics, possibility to filter etc.

netwatch - shows hosts, incoming and outgoing

slurm - colorized display of one interface, for example: slurm -i eth0

wavemon - shows wifi/wlan statistics

Network speed

To find interfaces do:

ifconfig -a

To find connection speed (ie 1000Mbit) do:

ethtool <interface>

For example: ethtool eth0

To watch statistics and current speed do:

slurm -i <interface>

For example slurm -i eth0

iperf - test connection speed

On the server side, run:

iperf -s -w 128K

On the client side, run:

iperf -c xxx.xxx.xxx.xxx -w 128K

(Where xxx.xxx.xxx.xxx is server IP address.)

-w controls TCP window.

Disk speed monitoring tools

iostat
iotop
vmstat