我现在正在使用 Ubuntu 22.04，ifupdown-wait-online.service 需要 5 分钟才能加载，xfce 也是如此。我给出了：
# systemd-analyze blame
结果如下；正如我所想的那样：
https://pastebin.ubuntu.com/p/XqMKnqNBjZ
我在这里找到了该问题的可能解决方案：
https://bbs.archlinux.org/viewtopic.php?id=256366
这是我所做的：
https://pastebin.ubuntu.com/p/yGRSB7WDXZ/
但不，它不起作用。 ifupdown-wait-online.service 仍然需要 5 分钟才能运行：
root@chromarietto:~# systemd-analyze blame
5min 1.101s ifupdown-wait-online.service
我尝试了另一种方法，但效果不佳：
root@chromarietto:~# systemctl disable systemd-networkd-wait-online.service
Removed /etc/systemd/system/network-online.target.wants/systemd-networkd-wait-online.service.
root@chromarietto:~# systemctl stop systemd-networkd-wait-online.service
root@chromarietto:~# reboot
Connection to 192.168.1.6 closed by remote host. Connection to 192.168.1.6 closed.
root@Z390-AORUS-PRO-DEST:/home/ziomario# ssh -Y [email protected]
[email protected]'s password:
"System is booting up. Unprivileged users are not permitted to log in yet. Please come back later. For technical details, see pam_nologin(8)." Warning: No xauth data; using fake authentication data for X11 forwarding.
"System is booting up. Unprivileged users are not permitted to log in yet. Please come back later. For technical details, see pam_nologin(8)."
Welcome to Ubuntu 22.04.3 LTS (GNU/Linux 5.4.244 armv7l)
Documentation: https://help.ubuntu.com
Management: https://landscape.canonical.com
Support: https://ubuntu.com/advantage
Expanded Security Maintenance for Applications is not enabled.
0 updates can be applied immediately.
Enable ESM Apps to receive additional future security updates. See https://ubuntu.com/esm or run: sudo pro status
Last login: Tue Sep 12 12:14:55 2023 from 192.168.1.2
root@chromarietto:~# systemd-analyze blame
Bootup is not yet finished (org.freedesktop.systemd1.Manager.FinishTimestampMonotonic=0).
Please try again later.
Hint: Use 'systemctl list-jobs' to see active jobs
root@chromarietto:~# systemctl list-jobs
No jobs running.
更新 ：
一位 Ubuntu 开发人员解释说：
ifupdown 很久以前就在 ubuntu 中被弃用，取而代之的是 systemd-networkd/netplan，据我所知甚至 debian 也放弃了它，因此它与 systemd 的集成可能会有很大欠缺...
好的，但我还是不知道如何解决这个问题。他说得有点含糊。
答案1
解决方案是禁用ifupdown-wait-online.service（不是systemd-networkd-wait-online.service）
sudo systemctl disable ifupdown-wait-online.service