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NetworkManager
NetworkManager - short NM - is a program to automatically detect and connect to networks by providing options for various configuration. It is used to set up Wi-Fi.
Setup
NetworkManager can be installed with the networkmanager package on most linux
distributions which provides daemon aswell as nmcli a command line interface
and nmtui a terminal user interface for
configuration.
Additionally nm-connection-editor can be installed for a graphical user
interface.
Usage
After installation networkmanager.service has to be enabled by the used
init-system (for example
systemD).
OpenVPN
NetworkManager needs a plugin to work with openvpn configurations.
This plugin can be installed with the networkmanager-openvpn package.
OpenVPNs .ovpn files can then be imported by running
nmcli connection import type openvpn file <openvpn-file>.
Afterwards they can be modified accordingly.
Troubleshooting
This section focusses on the troubleshooting of situations where the system does not connect correctly.
Restarting and Reenabling Wi-Fi
A useful chain of commands is the following. It will restart the SystemD service and enable the Wi-Fi device.
systemctl restart NetworkManager
nmcli radio wifi on