update 24 Jun 2026 : 今天我升另一台 FreeBSD 14.4 到 p6 就没问题,看起来有修护? update 27 Jun 2026 : 今天 FreeBSD 14.4 到 p6 又 sshd 消失了 freebsd-update fetch & install 後,版本为 freebsd 14.4 p6 跑完 install 後会有 Installing updates...install: ///usr/src/tests/sys/kern/tty: No such file or directory Restarting sshd after upgrade Performing sanity check on sshd configuration. Stopping sshd. Waiting for PIDS: 910. Performing sanity check on sshd configuration. Starting sshd. /usr/libexec/sshd-auth does not exist or is not executable /etc/rc.d/sshd: WARNING: failed to start sshd done. 这时重开就没 sshd 了,若是实体机没 IPKVM 或者人不在面前,那就.. 因为改呼叫 /usr/libexec/sshd-auth ,但升级後又没有. 10.0p2 root@WEB-2026:/usr/ports/www/apache24 # ps uax | grep ssh root 1538 0.0 0.0 25284 10208 - Is 00:56 0:00.01 sshd: /usr/sbin/sshd [listener] 0 of 10-100 root 2288 0.0 0.0 25792 12312 - Is 01:03 0:00.02 sshd-session: abc [priv] (sshd-session) abc 2291 0.0 0.0 28352 13088 - S 01:04 0:01.31 sshd-session: abc@pts/0 (sshd-session) 9.9 root@dns1:~ # ps aux | grep sshd root 798 0.0 0.0 23508 4428 - Ss 10May26 0:00.35 sshd: /usr/sbin/sshd [listener] 0 of 10-100 startups (sshd) root 90192 0.0 0.1 24040 10192 - Is 02:41 0:00.02 sshd-session: abc [priv] (sshd-session) abc 90195 0.0 0.1 24040 10484 - S 02:42 0:00.04 sshd-session: abc@pts/0 (sshd-session) 8.8 root@web:/tmp # ps aux | grep ssh root 771 0.0 0.1 21096 8204 - Is Sat17 0:00.09 sshd: /usr/sbin/sshd [listener] 0 of 10-10 root 19328 0.0 0.1 21536 9676 - Is 23:07 0:00.02 sshd: abc [priv] (sshd) abc 19331 0.0 0.1 21536 9936 - S 23:07 0:01.26 sshd: abc@pts/0 (sshd) 补救方法,非官方 down base cd /tmp mkdir bsdbase cd bsdbase wget https://download.freebsd.org/releases/amd64/amd64/14.4-RELEASE/base.txz tar -xvJf base.txz cd /tmp/bsdbase/usr/sbin cp sshd /usr/sbin cd /tmp/bsdbase/usr/libexec cp sshd-* /usr/libexec/ /usr/sbin/sshd telnet 0 22 Trying 0.0.0.0... Connected to 0. Escape character is '^]'. SSH-2.0-OpenSSH_10.0 FreeBSD-20250801 quit Invalid SSH identification string. Connection closed by foreign host. 从 base.txz 放回去就是 10.0p2 了 [root@mail ~]# /usr/sbin/sshd -v sshd: illegal option -- v OpenSSH_10.0p2, OpenSSL 3.0.20 7 Apr 2026 usage: sshd [-46DdeGiqTtV] [-C connection_spec] [-c host_cert_file] [-E log_file] [-f config_file] [-g login_grace_time] [-h host_key_file] [-o option] [-p port] [-u len] root@mail:~ # freebsd-version -ku 14.4-RELEASE-p5 14.4-RELEASE-p5 root@mail:~ # uname -a FreeBSD mail.abc.com 14.4-RELEASE-p5 FreeBSD 14.4-RELEASE-p5 GENERIC amd64 root@mail:~ # telnet 0 22 Trying 0.0.0.0... Connected to 0. Escape character is '^]'. SSH-2.0-OpenSSH_10.0 FreeBSD-20250801 quit Invalid SSH identification string. Connection closed by foreign host. root@mail:~ # /usr/sbin/sshd -v sshd: illegal option -- v OpenSSH_10.0p2, OpenSSL 3.0.16 11 Feb 2025 usage: sshd [-46DdeGiqTtV] [-C connection_spec] [-c host_cert_file] [-E log_file] [-f config_file] [-g login_grace_time] [-h host_key_file] [-o option] [-p port] [-u le[A 14.4-RELEASE-p5 之前没问题, 最近要更新的注意一下. 如果 /tmp/bsdbase 不能删除,则要做以下处理 root@dns1:/tmp # rm -rf bsdbase/ rm: bsdbase/var/empty: Operation not permitted rm: bsdbase/var: Directory not empty rm: bsdbase/usr/bin/chpass: Operation not permitted rm: bsdbase/usr/bin/su: Operation not permitted rm: bsdbase/usr/bin/crontab: Operation not permitted rm: bsdbase/usr/bin/login: Operation not permitted rm: bsdbase/usr/bin/passwd: Operation not permitted rm: bsdbase/usr/bin: Directory not empty rm: bsdbase/usr: Directory not empty rm: bsdbase/sbin/init: Operation not permitted rm: bsdbase/sbin: Directory not empty rm: bsdbase/libexec/ld-elf.so.1: Operation not permitted rm: bsdbase/libexec/ld-elf32.so.1: Operation not permitted rm: bsdbase/libexec: Directory not empty rm: bsdbase/lib/libc.so.7: Operation not permitted rm: bsdbase/lib/libcrypt.so.5: Operation not permitted rm: bsdbase/lib/librt.so.1: Operation not permitted rm: bsdbase/lib/libthr.so.3: Operation not permitted rm: bsdbase/lib: Directory not empty rm: bsdbase/: Directory not empty root@dns1:/tmp # ls -lo bsdbase/sbin/init -r-xr-xr-x 1 root wheel schg,uarch 1236656 Mar 6 18:34 bsdbase/sbin/init root@dns1:/tmp # chflags -R noschg bsdbase/ root@dns1:/tmp # rm -rf bsdbase/ root@dns1:/tmp # --

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