my-docs/Linux/Basic-Administration/21-route.md

🛣️ route Command Documentation

The route command is used to view and manipulate the IP routing table in Linux systems. Below is a concise guide to listing, adding, and deleting routes using route.

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📋 View Routing Table

route -n

• Description: Displays the kernel routing table.
• -n: Shows numerical addresses instead of resolving hostnames (faster and cleaner).

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➕ Add Routes

Add a Network Route

route add -net 10.10.10.0 netmask 255.255.255.0 gw 192.168.1.1

• -net 10.10.10.0: Specifies the network address.
• netmask 255.255.255.0: Defines the subnet mask for the network.
• gw 192.168.1.1: Sets the gateway through which packets will be routed.

Add a Default Gateway

route add default gw 192.168.1.1

• default: Indicates this is the default route.
• gw 192.168.1.1: The default gateway IP address for all traffic not destined for a known network.

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❌ Delete Routes

Delete a Network Route

route del -net 10.10.10.0 netmask 255.255.255.0

• Removes the specified network route.

Delete the Default Route

route del default

• Removes the current default gateway.

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📎 Notes

• These commands typically require superuser (root) privileges. Use sudo if needed:

  sudo route add ...
  

• Consider using ip route instead of route, as route is deprecated on some modern distributions:

  ip route show