"unable to register authentication agent: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name org.freedesktop.PolicyKit1 was not provided by any .service files" 오류 발생 시…
퍼미션 점검
cd /
chown root:root .
chmod 755 .
실행 후 ls -al / 하여 .과 ..의 퍼미션 확인