Understanding Network Manager
Network Manager is a fantastic utility for managing network connectivity on your server, though it's not for everyone. This utility comes installed by default with Ubuntu Server, but if you're using a cloud appliance (such as a VPS), it's most likely disabled, or maybe even removed. The reason for this is because even though this utility is very useful, it's not necessarily the best fit for every use-case.
Network Manager is a service (a.k.a. daemon) that runs in the background and manages your network connections. On a desktop Linux distribution, it does everything from managing connectivity to managing your wireless networks. With it, you can configure profiles, and create custom connections you can switch between. ...
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