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1. Made sure everything was updated and did; freebsd-update fetch & freebsd-update install (nothing to do becuase I was up to date).
2. freebsd-update -r 14.1-RELEASE upgrade
3. freebsd-update install
4. shutdown -r now
5. freebsd-update install
6. shutdown -r now (maybe overkill)
7. pkg-static upgrade -f
8. freebsd-update install (nothing to do)
9. shutdown -r now

freebsd-version -kru gave me;
14.1-RELEASE
14.0-RELEASE
14.1-RELEASE

Then I did freebsd-update fetch & freebsd-update install and the system reverted back to 14.0
来自：https://forums.freebsd.org/threads/upgrading-to-14-1.93700/

实践如下：
freebsd-update fetch & freebsd-update install

[root@core ~]# sudo freebsd-update install
No updates are available to install.
Run '/usr/sbin/freebsd-update fetch' first.
[root@core ~]# uname  -rasp
FreeBSD core.hatch.l.lw4.cn 14.0-RELEASE-p9 FreeBSD 14.0-RELEASE-p9 #0: Tue Aug  6 19:52:06 UTC 2024     root@amd64-builder.daemonology.net:/usr/obj/usr/src/amd64.amd64/sys/GENERIC amd64 amd64
[root@core ~]# freebsd-update fetch
Looking up update.FreeBSD.org mirrors... 3 mirrors found.
Fetching metadata signature for 14.0-RELEASE from update1.freebsd.org... done.
Fetching metadata index... done.
Inspecting system... done.
Preparing to download files... done.

No updates needed to update system to 14.0-RELEASE-p9.
You have new mail in /var/mail/root
[root@core ~]# freebsd-update -r 14.1-RELEASE upgrade
Looking up update.FreeBSD.org mirrors... 3 mirrors found.
Fetching metadata signature for 14.0-RELEASE from update1.freebsd.org... done.
Fetching metadata index... done.
Fetching 1 metadata files... done.
Inspecting system... done.

The following components of FreeBSD seem to be installed:
kernel/generic kernel/generic-dbg src/src world/base world/lib32

The following components of FreeBSD do not seem to be installed:
world/base-dbg world/lib32-dbg

Does this look reasonable (y/n)? y

Fetching metadata signature for 14.1-RELEASE from update1.freebsd.org... done.
Fetching metadata index... done.
Fetching 1 metadata patches. done.
Applying metadata patches... done.
Fetching 1 metadata files...
6490....6500....6510....6520....6530....6540....6550....6560....6570....6580....6590....6600....6610....6620....6630....6640....6650....6660....6670....6680....6690....6700....6710....6720....6730....6740....6750....6760....6770....6780....6790....6800....6810....6820....6830....6840....6850....6860....6870....6880....6890....6900....6910....6920....6930....6940....6950.Timeout, server 10.10.0.1 not responding.


Freebsd升级到这一步，不想升级了，清理掉产生的内容，怎么弄？
freebsd-update rollback
rm -rf /var/db/freebsd-update/*
rm -rf /usr/freebsd-update/*

作者：jackxiang@向东博客 专注WEB应用 构架之美 --- 构架之美，在于尽态极妍 | 应用之美，在于药到病除
地址：http://jackxiang.com/post/12538/
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