1. Execute the route command under Linux
[root@localhost backup]# route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.168.0.1 0.0.0.0 UG 100 0 0 enp0s3
192.168.0.0 0.0.0.0 255.255.255.0 U 100 0 0 enp0s3
192.168.122.0 0.0.0.0 255.255.255.0 U 0 0 0 virbr0
[root@localhost backup]# route
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
default gateway 0.0.0.0 UG 100 0 0 enp0s3
192.168.0.0 0.0.0.0 255.255.255.0 U 100 0 0 enp0s3
192.168.122.0 0.0.0.0 255.255.255.0 U 0 0 0 virbr0
Detailed explanation of the two route commands
1. Command syntax
route [-n]
Options and parameters:
-n: Display the hostname as an IP
2. Analysis of query results
Destination : In fact, it means Network.
Gateway : It is the
IP of the gateway of the interface. If it is 0.0.0.0, it means that no additional IP is required.
Genmask: It is Netmask, which is
combined with Destination to form a host or network.
Flags: There are multiple flags that can represent the meaning of the network or host.
U: Indicates that the route is available.
G: The representative needs to go through the
Gateway to help deliver it.
H: Indicates that the line is routed to a host, not a network.
Iface: It means the interface (interface).