nifd Linux Service

nifd service:

Network interface monitor. Calls mDNSResponder if your IP address changes.
Howl Client.
Now lets see the manual of nifd service.
Manual nifd:
NAME
nifd - network interface monitor daemon
SYNOPSIS
nifd [options]
DESCRIPTION
The nifd daemon monitors the network interfaces on a host and signals autoipd(8) and mDNSResponder(8) when an IP address or a link status changes. Only one instance of nifd needs to run on a host. Once started, nifd runs continuously. nifd is typically launched as follows:
OPTIONS
-h
Display brief help message
-v
Display version information
-d
Run in debug mode
-n
On relink, do not run ifdown/ifup
-i
Set poll interval to seconds
SEE ALSO
autoip(8) , mDNSResponder(8)