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O arquivo de serviço
org.freedesktop.NetworkManager
é fornecido pornetwork-manager
package.$ grep -rl NetworkManager /etc/dbus-1/ /usr/share/dbus-1/ /etc/dbus-1/system.d/nm-pptp-service.conf /etc/dbus-1/system.d/nm-strongswan-service.conf /etc/dbus-1/system.d/nm-vpnc-service.conf /etc/dbus-1/system.d/nm-openvpn-service.conf /etc/dbus-1/system.d/org.freedesktop.NetworkManager.conf /etc/dbus-1/system.d/nm-iodine-service.conf /etc/dbus-1/system.d/nm-openconnect-service.conf /usr/share/dbus-1/system-services/org.freedesktop.nm_dispatcher.service $ dpkg -S /etc/dbus-1/system.d/org.freedesktop.NetworkManager.conf network-manager: /etc/dbus-1/system.d/org.freedesktop.NetworkManager.conf
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Tente reinstalá-lo e reinicialize
sudo apt-get install --reinstall network-manager sudo reboot