route:tldr:d8441

The command "sudo route flush" is used to flush or clear out the routing table on a Unix-based system.

Routing tables are used by the operating system to determine the best path for network traffic. They contain a list of IP addresses or network destinations and their respective next-hop or gateway addresses.

When you execute the "sudo route flush" command with superuser privileges (sudo), it will remove all the entries from the routing table, effectively clearing it. This can be useful in certain situations, such as when troubleshooting network connectivity issues or when you want to reset the routing table to its default state.

By flushing the routing table, you are forcing the system to rebuild the routing information from scratch. It will then start learning and populating the routing table again based on the current network configuration, including any new or changed network interfaces, routing protocols, or static routes that are configured.

It's important to note that flushing the routing table will temporarily disrupt network connectivity until the system rebuilds the routing information. Therefore, this command should be used with caution and only when necessary.