How to calculate wlan0 interface speed

Question

When, I try to cat the speed file, in /sys/class/net I get the following error

$ cat /sys/class/net/wlan0/speed 
cat: /sys/class/net/wlan0/speed: Invalid argument #throws error

Whereas, for eth0 it shows

$ cat /sys/class/net/eth0/speed
1000

Can I know the reason for the error for wlan alone. Also the duplex is unkown for wlan0 but the carrier is set to 1?

score 2 · Answer 1 · answered Dec 27 '16 at 15:22

2

Look at the output of iwconfig <interface>.

answered Dec 27 '16 at 15:22

phk

yeah. It's working thanks. Can I know from which file does iwconfig calculates – Arunagiriswaran Ezhilan Dec 27 '16 at 15:33

score -1 · Answer 2 · answered Dec 27 '16 at 14:58

-1

You can use all of these commands (I recommend ethtool)

dmesg | grep <interface>

mii-tool

ethtool <interface>

answered Dec 27 '16 at 14:58

Zwans

ethtool just outputs link detected: yes – Arunagiriswaran Ezhilan Dec 27 '16 at 15:13
nothing else but for eth0 it gives speed and other stuffs – Arunagiriswaran Ezhilan Dec 27 '16 at 15:14

2 Answers2