我是 Ubuntu 新手。只是想知道是否有任何方法可以进一步减少我的启动时间（我正在使用 HDD）。目前需要 1 分 31 秒。
systemd-analyze
Startup finished in 8.061s (kernel) + 1min 23.131s (userspace) = 1min 31.192s
graphical.target reached after 1min 23.055s in userspace
以下是详细信息：
systemd-analyze blame
42.635s plymouth-quit-wait.service
23.877s systemd-journal-flush.service
22.750s networkd-dispatcher.service
20.374s snapd.service
19.755s NetworkManager-wait-online.service
14.015s udisks2.service
13.017s apache2.service
12.189s dev-sda2.device
11.926s ModemManager.service
11.647s cups.service
10.216s dev-loop15.device
9.726s dev-loop5.device
9.033s gdm.service
8.706s accounts-daemon.service
7.684s NetworkManager.service
7.063s snapd.seeded.service
5.838s dev-loop3.device
5.807s dev-loop14.device
5.784s dev-loop11.device
5.781s dev-loop16.device
5.761s dev-loop10.device
5.522s power-profiles-daemon.service
5.440s polkit.service
5.150s dev-loop12.device
5.128s dev-loop13.device
5.111s dev-loop17.device
5.072s dev-loop6.device
4.961s dev-loop9.device
4.926s dev-loop8.device
4.878s dev-loop2.device
4.806s dev-loop0.device
4.540s avahi-daemon.service
4.538s bluetooth.service
4.108s thermald.service
3.806s switcheroo-control.service
3.799s systemd-logind.service
3.775s wpa_supplicant.service
3.180s dev-loop4.device
2.733s systemd-resolved.service
2.705s dev-loop7.device
2.644s gpu-manager.service
2.240s systemd-tmpfiles-setup.service
2.212s secureboot-db.service
2.179s rsyslog.service