https://askubuntu.com/questions/1029636/slow-boot-times-since-18-04-installation/1029880?noredirect=1#comment1685375_1029880
https:/ /askubuntu. com/questions/ 1029636/ slow-boot- times-since- 18-04-installat ion/1029880? noredirect= 1#comment168537 5_1029880