Linux- Physical Cable Communication

Many cases we will try using google.com in order to find out about our network connections. Linux provides us various ways in order to check whether there exists a physical cable connection. In this article we will see how we can find out this

Check for the available networks,

[root@localhost work]# cat /sys/class/net/
enp2s0/ lo/     virbr0/

Check whether Physical connection is available,

[root@localhost work]# cat /sys/class/net/enp2s0/carrier
1

[root@localhost work]# cat /sys/class/net/lo/carrier
1
[root@localhost work]# cat /sys/class/net/virbr0/carrier
0

“1” indicates physical connection availability and “0” none.

We can also use the below commands to check the same

[root@localhost work]# cat /sys/class/net/enp2s0/operstate
up

[root@localhost work]# cat /sys/class/net/virbr0/operstate
down

Hope this tip helps,