The time the IP address will be considered valid 86,240 seconds is 23 hours and 57 minutes. enp0s3: The interface with which this IP address is associated.Likewise, if this IP address is deleted, don’t look for a route to delete. Someone has to add a route manually if he wants to use one with this IP address. noprefixroute: Do not create a route in the route table when this IP address is added.
dynamic: The IP address is lost when the interface goes down.scope global: The IP address is valid everywhere on this network.brd 192.168.4.255: The broadcast address for this subnet.An eight-bit binary number equates to 255 therefore, the subnet mask is 255.255.255.0. The “/24” tells us there are 24 contiguous leading bits set to one in the subnet mask.
#Grep ip address linux mac
link/ether: The MAC address of the interface.qlen 1000: The maximum length of the transmission queue.group default: This interface is in the “default” interface group.state UP: The interface is operational and connected.qdisc fq_codel: The scheduler is using a discipline called “Fair Queuing, Controlled Delay.” It’s designed to provide a fair share of the bandwidth to all the traffic flows that use the queue.mtu 1500: The maximum transfer unit this interface supports.The hardware layer of the network (layer one) is also UP. : This interface supports broad- and multicasting, and the interface is UP (operational and connected).The “en” stands for ethernet, “p0” is the bus number of the ethernet card, and “s3” is the slot number. enp0s3: The network interface name as a string.The physical interface is more interesting, as we’ll show below: inet6: The IP version 6 address, scope, valid_lft, and preferred_lft.This should never be larger than the valid_lft value. For an IP version 4 IP address allocated by DHCP, this is the amount of time the IP address can be used with no restrictions. For an IP version 4 IP address allocated by Dynamic Host Configuration Protocol (DHCP), this is the length of time the IP address is considered valid and able to make and accept connection requests. lo: The interface with which this IP address is associated.This IP address is only valid inside the computer (the “host”). Eight bits set to one represents 255 in binary, so the subnet mask is 255.0.0.0. The part of the address after the forward-slash ( /) is Classless Inter-Domain Routing notation (CIDR) representing the subnet mask. It indicates how many leading contiguous bits are set to one in the subnet mask. The value of eight means eight bits. link/loopback: The media access control (MAC) address of the interface.qlen 1000: The maximum length of the transmission queue.The default is to place them all in a group called “default.” group default: Interfaces can be grouped logically.state UNKNOWN: This can be DOWN (the network interface is not operational), UNKNOWN (the network interface is operational but nothing is connected), or UP (the network is operational and there is a connection).The noqueue discipline means “send instantly, don’t queue.” This is the default qdisc discipline for virtual devices, such as the loopback address. There are different queuing techniques called disciplines. It schedules the transmission of packets. qdisc noqueue: A qdisc is a queuing mechanism.This is the size of the largest chunk of data this interface can transmit. The physical networking layer (layer one) is also up. lo: The network interface name as a string.Let’s break down all the information we received:
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