route Linux Commands
What is Linux route Command?
Explanation
route COMMAND:route command displays routing table resides in kernel and also used to modify the routing table.The tables which specifies how packets are routed to a host is called routing table.SYNTAX :
route [options]OPTIONS:
-n
dispalys routing table in numerical[IP Address] format
-e
dispalys routing table in Hostname format
add
Adds a new route to the routing table
del
Deletes a route from the routing table
Options used with add and del :
-net
Indicate the target is network
-host
Indicate the target is host
gw
Specifies the gateway of target host/network
netmask
Used to specifiy the subnet-mask of destination network/host
dev
Specify the device or interface where the packets will be sent
reject
rejects the packets sent to particular route/host
EXAMPLE:
- To dispaly the routing table:
route -n
The above command will print:
Destination Gateway Genmask Flags Metric Ref Use Iface 192.168.0.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0 169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0 0.0.0.0 192.168.0.1 0.0.0.0 UG 0 0 0 eth0
In above table: Destination -Indicates the IP address of desination host/network Gateway -Indicates gateway from which desination host/network could be reached Genmask -Indicates the subnetmask destination Flags -Indicates the current status of route
- U - Route is up
- H - Target is a host
- G - Use gateway
Iface -Indicates the interface
- To add static route to a network in the routing table:
route add -net 192.168.1.0 netmask 255.255.255.0 gw 192.168.1.1 dev eth0
In above command: add -Indicates that the route is added to routing table. -net -Indicates that desination is a network. 192.168.0.1 -Indicates IP address of destination network. netmask -Indicates the subnetmask of destination network. gw 192.168.1.1 -Indicates the gateway of destination network. dev eth0 -Indicates that the packets are routed via the interface eth0.
- To delete a route from the routing table:
route del -net 192.168.1.0 netmask 255.255.255.0 gw 192.168.1.1 dev eth0
The above command will delete the route to 192.168.1.0 from the routing table.
route [options]
OPTIONS:
-n
dispalys routing table in numerical[IP Address] format
-e
dispalys routing table in Hostname format
add
Adds a new route to the routing table
del
Deletes a route from the routing table
Options used with add and del :
-net
Indicate the target is network
-host
Indicate the target is host
gw
Specifies the gateway of target host/network
netmask
Used to specifiy the subnet-mask of destination network/host
dev
Specify the device or interface where the packets will be sent
reject
rejects the packets sent to particular route/host
EXAMPLE:
- To dispaly the routing table:
route -n
The above command will print:
Destination Gateway Genmask Flags Metric Ref Use Iface 192.168.0.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0 169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0 0.0.0.0 192.168.0.1 0.0.0.0 UG 0 0 0 eth0
In above table: Destination -Indicates the IP address of desination host/network Gateway -Indicates gateway from which desination host/network could be reached Genmask -Indicates the subnetmask destination Flags -Indicates the current status of route
- U - Route is up
- H - Target is a host
- G - Use gateway
Iface -Indicates the interface
- To add static route to a network in the routing table:
route add -net 192.168.1.0 netmask 255.255.255.0 gw 192.168.1.1 dev eth0
In above command: add -Indicates that the route is added to routing table. -net -Indicates that desination is a network. 192.168.0.1 -Indicates IP address of destination network. netmask -Indicates the subnetmask of destination network. gw 192.168.1.1 -Indicates the gateway of destination network. dev eth0 -Indicates that the packets are routed via the interface eth0.
- To delete a route from the routing table:
route del -net 192.168.1.0 netmask 255.255.255.0 gw 192.168.1.1 dev eth0
The above command will delete the route to 192.168.1.0 from the routing table.
| -n | dispalys routing table in numerical[IP Address] format |
| -e | dispalys routing table in Hostname format |
| add | Adds a new route to the routing table |
| del | Deletes a route from the routing table |
| -net | Indicate the target is network |
| -host | Indicate the target is host |
| gw | Specifies the gateway of target host/network |
| netmask | Used to specifiy the subnet-mask of destination network/host |
| dev | Specify the device or interface where the packets will be sent |
| reject | rejects the packets sent to particular route/host |
- To dispaly the routing table:route -n
The above command will print:Destination Gateway Genmask Flags Metric Ref Use Iface 192.168.0.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0 169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0 0.0.0.0 192.168.0.1 0.0.0.0 UG 0 0 0 eth0
In above table: Destination -Indicates the IP address of desination host/network Gateway -Indicates gateway from which desination host/network could be reached Genmask -Indicates the subnetmask destination Flags -Indicates the current status of route - U - Route is up
- H - Target is a host
- G - Use gateway
Iface -Indicates the interface - To add static route to a network in the routing table:
route add -net 192.168.1.0 netmask 255.255.255.0 gw 192.168.1.1 dev eth0In above command: add -Indicates that the route is added to routing table. -net -Indicates that desination is a network. 192.168.0.1 -Indicates IP address of destination network. netmask -Indicates the subnetmask of destination network. gw 192.168.1.1 -Indicates the gateway of destination network. dev eth0 -Indicates that the packets are routed via the interface eth0. - To delete a route from the routing table:
route del -net 192.168.1.0 netmask 255.255.255.0 gw 192.168.1.1 dev eth0 The above command will delete the route to 192.168.1.0 from the routing table.
