Is there a command that I can verify by its output the speed of my NIC and some information about its characteristics such as duplex full or half .
3 Answers
Suppose your NIC name eth0 :
You can verify the speed and some informations by three Commands :
First Command :
dmesg |grep eth0Output :
Second Command :
mii-tool -v eth0Output :
FD : full duplex , Logic that enables concurrent sending and receiving. This is usually desirable and enabled when your computer is connected to a switch.
HD : half duplex , his logic requires a card to only send or receive at a single point of time. When your machine is connected to a Hub, it auto-negotiates itself and uses half duplex to avoid collisions.
Third command :
ethtool eth0
ethtool - Display or change ethernet card settingsInstall ethtool :
sudo apt-get install ethtoolOutput :
Settings for eth0: Supported ports: [ TP ] Supported link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Full Supported pause frame use: No Supports auto-negotiation: Yes Advertised link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Full Advertised pause frame use: No Advertised auto-negotiation: Yes Speed: 1000Mb/s Duplex: Full Port: Twisted Pair PHYAD: 0 Transceiver: internal Auto-negotiation: on MDI-X: Unknown Supports Wake-on: d Wake-on: d Current message level: 0x00000007 (7) drv probe link Link detected: yesHope it helps .
2To obtain the link speed of an interface without parsing logs or installing additional tools, simply read its corresponding speed sysfs node, as follows:
cat /sys/class/net/<interface>/speedwhere is the name of your NIC, e.g. eth0
1You can use NetSpeed Extension
NetSpeed is a GNOME shell extension that displays the sum of your download and upload speed in your gnome panel. Clicking on it displays the separate values in a drop-down.
You can download it from Ubuntu Software Store.
It is applicable only if you use the GNOME desktop environment.
Reference:
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