昨晚装的，今早就有更新了，刚好做个笔记。
更新前的版本：
[root@fb11 ~]# uname -a FreeBSD fb11 11.2-RELEASE FreeBSD 11.2-RELEASE #0 r335510: Fri Jun 22 04:09:26 UTC 2018 root@releng2.nyi.freebsd.or g:/usr/obj/usr/src/sys/GENERIC i386
下载更新的命令：freebsd-update fetch
[root@fb11 ~]# freebsd-update fetch src component not installed, skipped Looking up update.FreeBSD.org mirrors... 2 mirrors found. Fetching public key from update4.freebsd.org... done. Fetching metadata signature for 11.2-RELEASE from update4.freebsd.org... done. Fetching metadata index... done. Fetching 2 metadata files... done. Inspecting system... done. Preparing to download files... done. Fetching 11 patches.....10 done. Applying patches... done. The following files will be updated as part of updating to 11.2-RELEASE-p4: /bin/freebsd-version /boot/kernel/kernel /usr/bin/gprof /usr/include/netinet6/in6.h /usr/include/netinet6/ip6_var.h /usr/include/x86/specialreg.h /usr/sbin/wpa_supplicant /usr/share/man/man4/inet.4.gz /usr/share/man/man4/inet6.4.gz /usr/share/man/man4/tcp.4.gz /usr/share/man/mandoc.db
这里提示下载了11个补丁，然后安装命令：freebsd-update install
[root@fb11 ~]# freebsd-update install src component not installed, skipped Installing updates... done.
reboot重启以后系统版本变化了：
[root@fb11 ~]# uname -a FreeBSD fb11 11.2-RELEASE-p4 FreeBSD 11.2-RELEASE-p4 #0: Thu Sep 27 07:46:01 UTC 2018 root@amd64-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC i386
就这么简单……