ip route add network command for Linux explained

The ip route add command is used to add a new route to the Linux kernel's routing table. It is typically used to specify the next hop for a particular network or host.

The basic syntax of the ip route add command is:

ip route add [ options ] destination [ via gateway ] [ dev device ] [ metric n ] [ mtu n ] [ advmss n ]

• destination is the network or host that the route applies to. It can be specified in CIDR notation (e.g., 192.0.2.0/24 for a network or 192.0.2.1 for a host).
• via gateway is the next hop for the route. It can be specified as an IP address or a hostname.
• dev device is the name of the network interface that the route applies to.
• metric n is the metric (or cost) of the route. A lower metric indicates a more preferred route.
• mtu n is the maximum transmission unit (MTU) of the route.
• advmss n is the maximum segment size (MSS) advertised to TCP connections over the route.

Here are some examples of how the ip route add command can be used:

• Add a route for the network 192.0.2.0/24 through the gateway 192.0.2.1:

ip route add 192.0.2.0/24 via 192.0.2.1

• Add a route for the host 192.0.2.1 through the gateway 192.0.2.2:

ip route add 192.0.2.1 via 192.0.2.2

• Add a route for the network 192.0.2.0/24 through the gateway 192.0.2.1 using the eth0 network interface:

ip route add 192.0.2.0/24 via 192.0.2.1 dev eth0