Linux Administration Cookbook

How it works...

Again, we're using the ip suite to interact with the various network elements of our machine. Frequently, these commands can be used for troubleshooting and testing of environmental changes, prior to your making those changes permanent.

In the adding or removing of IP addresses to interfaces, you can create a situation where an interface has multiple IP addresses for use with different applications.

Before the days of SNI, it wasn't uncommon to see multiple IP addresses in use on web servers so that each HTTPS site could have its own IP assignment.

In the shutting down or bringing up of network interfaces, we're first telling our system to administratively down an interface, rather than physically unplugging an Ethernet cable. ...