This file must contain a "[main]" section that has at least one configuration option: "plugins".So a minimal system settings configuration file looks like this: Multiple plugins may be specified in a preference order using ',' as a separator (ie, "plugins=ifcfg-rh,keyfile") to allow more than one plugin to be used.In commercial scenario’s, this could be a firewall or other routing device.
Setting a static IP for a wireless interface is a bit different to the instructions contained here (to be covered in the future). My personal preference is to use IP’s between 192.168.0.100 – 192.168.0.200.
To specify a static connection we need to add the information we gathered above to /etc/network/interfaces.
My /etc/network/interfaces file (on every distro I’ve tried so far) was pretty much empty by default (as below), if you have something more you should be careful with removing entries, start by commenting out lines (using #) to see exactly what you are using.
Setting a static IP in Ubuntu is useful for a lot of things.
You may want to forward ports from your router to serve web pages, use SSH from outside your local network or set up some sort of media server.
Network Manager Configuration has a good overview of settings services in general.