我目前安装了 ubuntu 18.04.02，结果发现它启动速度太慢了。我甚至没有在 Ubuntu 的双启动中安装 Windows。我的笔记本电脑规格是
8th Gen Intel Core i5-8250U
NVIDIA GEFORCE MX150 (2G GDDR5) graphics
1 TB HDD
ram-8 GB
当我跑步的时候
systemd-分析时间
我得到了这个结果
启动耗时 3.961 秒（固件）+ 4.207 秒（加载器）+ 3.699 秒（内核）+ 32.893 秒（用户空间）= 44.762 秒 用户空间中 32.876 秒后达到 graphic.target
当我跑的时候
systemd-analyze 责备
我有
9.471s apparmor.service
8.423s dev-sda2.设备
7.925s systemd-tmpfiles-setup.service
7.479s NetworkManager-等待-在线.服务
6.352s snapd.service
5.076s 螺栓服务
4.843s gpu-manager.service
4.499s dev-loop4.device
3.933s NetworkManager.服务
3.775s dev-loop9.device
3.764s networkd-dispatcher.service
3.321s dev-loop0.device
3.283s dev-loop6.device
3.124s dev-loop8.device
3.034s ModemManager.服务
2.950s dev-loop7.device
2.888s dev-loop5.device
2.836s systemd-journal-flush.service
2.762s dev-loop1.device
2.656s dev-loop3.device
2.615s dev-loop2.device
2.611s udisks2.服务
2.536s thermald.service
1.904s systemd-udevd.service
1.725s 账户守护进程.服务
1.627s wpa_supplicant.service
1.463s 控制台设置.服务
1.302s 蓝牙.服务
1.247s systemd-timesyncd.服务
1.247s systemd-resolved.service
1.222s grub-common.service
1.179s plymouth-read-write.service
993ms systemd-tmpfiles-setup-dev.service
968ms dns-clean.service
920ms systemd-sysctl.service
817ms apport.service
788ms fwupd.服务
785ms 网络服务
683ms pppd-dns.服务
669ms systemd-modules-load.service
669ms nvidia-persistenced.service
652ms systemd-logind.service
636ms 键盘设置服务
591ms rsyslog.服务
550ms systemd-fsck@dev-disk-by\x2duuid-5338\x2d4FE1.service
548ms snap-core-6350.mount
509ms polkit.service
471ms snap-vlc-1049.mount
449ms snap-gnome\x2dcharacters-139.mount
398ms systemd-rfkill.service
360ms systemd-fsck@dev-disk-by\x2duuid-0d52a478\x2d7fc6\x2d4ec3\x2da7
355ms avahi-daemon.service
318ms setvtrgb.service
315ms upower.服务
295ms snap-overleaf-2.mount
279ms packagekit.service
256ms snap-gnome\x2dcalculator-260.mount
255ms dev-disk-by\x2duuid-c1c89474\x2d700e\x2d4066\x2d9650\x2d6bb12c1
251毫秒[电子邮件保护]
247ms systemd-random-seed.service
245ms snap-gtk\x2dcommon\x2dthemes-818.mount
243ms snap-gnome\x2dsystem\x2dmonitor-57.mount
230ms snap-gnome\x2d3\x2d26\x2d1604-74.mount
224ms snap-spotify-36.mount
208ms 主页.mount
206ms gdm.服务
147ms systemd-remount-fs.service
144ms systemd-journald.service
140ms systemd-udev-trigger.service
122ms systemd-backlight@backlight:intel_backlight.service
101ms snapd.socket
84ms snap-gnome\x2dlogs-45.mount
72ms 语音调度服务
72ms kerneloops.service
70毫秒[电子邮件保护]
67ms systemd-user-sessions.service
65ms systemd-update-utmp.service
58ms 启动-efi.mount
53ms 系统内核调试.mount
53ms kmod-静态节点.service
50ms ufw.服务
48ms colord.service
45ms alsa-restore.service
44ms systemd-tmpfiles-clean.service
41ms snapd.seed.service
39ms rtkit-daemon.service
18ms dev-hugepages.mount
14ms systemd-update-utmp-runlevel.service
7ms ureadahead-stop.service
3ms dev-mqueue.mount
2ms plymouth-退出-等待.服务
1ms 系统内核配置.mount
1ms 系统文件系统保险丝连接.mount
当我跑的时候
systemd-analyze 关键链我有
图形.目标@32.876s
└─multi-user.target @32.876s
└─kerneloops.service @32.803s +72ms
└─network-online.target @32.775s
└─NetworkManager-wait-online.service @25.295s +7.479s
└─NetworkManager.service @21.361秒 +3.933秒
└─dbus.service @20.698s
└─basic.target @20.683秒
└─sockets.target @20.683秒
└─snapd.socket @20.581秒+101毫秒
└─sysinit.target@20.580秒
└─apparmor.service @11.079秒 +9.471秒
└─local-fs.target @11.077秒
└─run-user-121.mount @27.731s
└─swap.target @10.422秒
└─开发磁盘-by\x2duuid-c1c89474\x2d700e\x2d4066\x2d96
└─dev-disk-by\x2duuid-c1c89474\x2d700e\x2d4066\x2d
有人能帮助我更快地启动它吗？