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In Terminal: nm-connection-editor. Add your new connection and also make it default: click Edit > General tab > check "Automatically connect to this network when it is available". Also, for the Ethernet connection which is present from the start: Edit > General tab > uncheck "Automatically connect to this network when it is available". Then connect to your newly added connection. enter image description hereenter image description here

In Terminal: nm-connection-editor. Add your new connection and also make it default: click Edit > General tab > check "Automatically connect to this network when it is available". Also, for the Ethernet connection which is present from the start: Edit > General tab > uncheck "Automatically connect to this network when it is available". Then connect to your newly added connection. enter image description here

In Terminal: nm-connection-editor. Add your new connection and also make it default: click Edit > General tab > check "Automatically connect to this network when it is available". Also, for the Ethernet connection which is present from the start: Edit > General tab > uncheck "Automatically connect to this network when it is available". Then connect to your newly added connection. enter image description here

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In Terminal: nm-connection-editor. Add your new connection and also make it default: click Edit > General tab > check "Automatically connect to this network when it is available". Also, for the Ethernet connection which is present from the start: Edit > General tab > uncheck "Automatically connect to this network when it is available". Then connect to your newly added connection. enter image description here