我已经在我的笔记本电脑上安装了 debian，现在我的笔记本电脑有三重启动系统：win7、ubuntu16.04、debian 9（有错误）。
现在 Ubutnu 需要更多时间来启动。
我认为它启动了两次（我是菜鸟）。
以下是该命令的输出systemd-analyze blame
15.048s dev-sda2.device
10.180s keyboard-setup.service
9.765s systemd-tmpfiles-setup-dev.service
8.491s systemd-sysctl.service
6.719s NetworkManager-wait-online.service
4.220s grub-common.service
3.500s upower.service
2.981s ModemManager.service
2.427s systemd-udev-trigger.service
1.752s systemd-logind.service
1.718s speech-dispatcher.service
1.712s alsa-restore.service
1.697s thermald.service
1.596s systemd-modules-load.service
1.470s NetworkManager.service
1.293s accounts-daemon.service
1.221s systemd-journald.service
1.163s avahi-daemon.service
1.155s polkitd.service
1.044s resolvconf.service
1.008s lightdm.service
771ms ufw.service
697ms systemd-fsck@dev-disk-by\x2duuid-b9c06585\x2d9538\x2d46f4\x2d9a
lines 1-23...skipping...
15.048s dev-sda2.device
10.180s keyboard-setup.service
9.765s systemd-tmpfiles-setup-dev.service
8.491s systemd-sysctl.service
6.719s NetworkManager-wait-online.service
4.220s grub-common.service
3.500s upower.service
2.981s ModemManager.service
2.427s systemd-udev-trigger.service
1.752s systemd-logind.service
1.718s speech-dispatcher.service
1.712s alsa-restore.service
1.697s thermald.service
1.596s systemd-modules-load.service
1.470s NetworkManager.service
1.293s accounts-daemon.service
1.221s systemd-journald.service
1.163s avahi-daemon.service
1.155s polkitd.service
1.044s resolvconf.service
1.008s lightdm.service
771ms ufw.service
697ms systemd-fsck@dev-disk-by\x2duuid-b9c06585\x2d9538\x2d46f4\x2d9af5\x2d96a5e822437f.service
393ms vboxdrv.service
387ms kmod-static-nodes.service
364ms irqbalance.service
294ms udisks2.service
293ms gpu-manager.service
255ms console-setup.service
243ms systemd-tmpfiles-setup.service
230ms rsyslog.service
196ms dev-mqueue.mount
195ms dev-hugepages.mount
187ms networking.service
179ms systemd-rfkill.service
158ms systemd-tmpfiles-clean.service
lines 1-36
您建议如何进行？