我已经使用 Ubuntu 8 年多了，它是我每天在家使用的引擎。然而，在我最近从 16.04 升级到 18.04 后，我发现启动时间和登录时间都大幅增加。从我按下电源按钮启动计算机到看到登录屏幕，需要将近 7 分钟。在早期版本中，我看到启动时间只有 30-40 秒。这种增加是不可接受的，并导致了很多问题。在早期版本 (16.04) 中，相同活动的总时间接近 2 分钟。
有人能帮忙吗？如果有帮助的话，我会粘贴 systemd-analyze blame 命令的输出。
administrator@shs:~$ systemd-analyze blame
1min 6.168s nmbd.service
51.843s plymouth-quit-wait.service
32.898s dev-sda5.device
29.043s systemd-journal-flush.service
15.212s apt-daily.service
11.922s mysql.service
7.681s systemd-tmpfiles-setup-dev.service
7.568s udisks2.service
6.789s NetworkManager-wait-online.service
6.239s networkd-dispatcher.service
5.849s snapd.service
4.821s accounts-daemon.service
4.712s ModemManager.service
4.662s NetworkManager.service
3.372s dev-loop0.device
3.371s dev-loop1.device
2.029s grub-common.service
1.940s keyboard-setup.service
1.784s motd-news.service
1.528s apparmor.service
1.515s apport.service
1.479s avahi-daemon.service
1.450s gdm.service
1.393s tlp.service
1.334s systemd-tmpfiles-clean.service
1.330s systemd-modules-load.service
1.271s systemd-tmpfiles-setup.service
1.255s sys-kernel-debug.mount
1.245s dev-mqueue.mount
1.227s preload.service
1.190s dev-hugepages.mount
1.169s ssh.service
administrator@shs:~$ systemd-analyze
Startup finished in 2min 14.394s (kernel) + 1min 58.449s (userspace) = 4min 12.844s
graphical.target reached after 1min 57.050s in userspace
administrator@shs:~$ systemd-analyze critical-chain
The time after the unit is active or started is printed after the "@" character.
The time the unit takes to start is printed after the "+" character.
graphical.target @1min 57.050s
└─multi-user.target @1min 57.047s
└─smbd.service @1min 56.286s +760ms
└─winbind.service @1min 56.072s +211ms
└─nmbd.service @49.900s +1min 6.168s
└─network-online.target @49.897s
└─NetworkManager-wait-online.service @43.107s +6.789s
└─NetworkManager.service @38.440s +4.662s
└─dbus.service @38.006s
└─basic.target @37.972s
└─sockets.target @37.972s
└─snapd.socket @37.952s +18ms
└─sysinit.target @37.923s
└─swap.target @37.923s
└─dev-disk-by\x2duuid-6edd976e\x2d0bed\x2d4197\x2da622\x2d387512273b5d.swap @37.813s +99ms
└─dev-disk-by\x2duuid-6edd976e\x2d0bed\x2d4197\x2da622\x2d387512273b5d.device @37.811s
有人可以帮忙吗？
谢谢
编辑
以下是 free -h 和 df -h 命令的输出：
administrator@shs:~$ free -h
total used free shared buff/cache available
Mem: 2.9G 2.2G 82M 440M 686M 206M
Swap: 2.0G 649M 1.3G
administrator@shs:~$ df -h
Filesystem Size Used Avail Use% Mounted on
udev 1.5G 0 1.5G 0% /dev
tmpfs 300M 3.4M 296M 2% /run
/dev/sda5 44G 32G 9.9G 77% /
tmpfs 1.5G 20M 1.5G 2% /dev/shm
tmpfs 5.0M 4.0K 5.0M 1% /run/lock
tmpfs 1.5G 0 1.5G 0% /sys/fs/cgroup
/dev/loop0 87M 87M 0 100% /snap/core/4486
/dev/loop1 6.0M 6.0M 0 100% /snap/communitheme/124
tmpfs 300M 16K 300M 1% /run/user/113
tmpfs 300M 136K 300M 1% /run/user/1000