Authorization not available. Check if polkit
Authorization not available. Check if polkit service is running or see debug message for more information.
dbus.socket failed to listen on sockets: Address family not supported by protocol
Failed to listen on D-Bus System Message Bus Socket.
這個問題是因為dbus.socket狀態異常，所有依賴dbus的啟動都會去通過systemcall連接 dbus，當服務不可用時，所有服務無法以systemd方式正常啟動/關閉。需要檢查dbus.socket是否正常。本地使用需保證unix套接字的監聽時啟動的
dbus重啟導致登陸慢
systemd-logind: Failed to connect to system bus: Connection refused
systemd-logind: Failed to fully start up daemon: Connection refused
systemd: systemd-logind.service: main process exited, code=exited, status=1/FAILURE
systemd: Unit systemd-logind.service entered failed state.
systemd: systemd-logind.service failed.
systemd: systemd-logind.service has no holdoff time, scheduling restart.
systemd: start request repeated too quickly for systemd-logind.service
systemd: Unit systemd-logind.service entered failed state.
systemd: systemd-logind.service failed.
dbus[7782]: [system] Failed to activate service 'org.freedesktop.login1': timed out
dbus-daemon: dbus[7782]: [system] Failed to activate service 'org.freedesktop.login1': timed out
參考：ssh登陸緩慢
systemd-logind主要功能是為每一個登陸session創建一個systemd角度的cgroup管理對象，更方便對session使用cgroup，在dbus服務異常時，systemd-logind會導致登陸緩慢，並不影響正常登陸和ssh登陸。重啟dbus.socket后需要也重啟systemd-logind
dbus開啟遠程連接
編輯 /usr/share/dbus-1/system.conf 或 /etc/dbus-1/session.conf
<listen>tcp:host=<ip>,bind=*,port=<port>,family=ipv4</listen>
<listen>unix:path=/run/user/<username>/dbus/user_bus_socket</listen>
<listen>unix:tmpdir=/tmp</listen>
<auth>ANONYMOUS</auth>
<allow_anonymous/>
參考：dbus-send使用