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背景：在Raspberry Pi上装了一个FreeBSD，之前是linux，用ssh连接时出现问题，这个ssh其实linux上也是一样的，于是按linux上的办法解决了该问题，重启动sshd后，用我的手机重新ssh到Raspberry pi上，提示error消失，连接正常。
root@rpi2:/usr/local # Feb 18 03:50:39 rpi2 sshd[4917]: error: Could not load host key: /etc/ssh/ssh_host_dsa_key
魅族手机ssh访问：
Feb 18 03:50:41 rpi2 sshd[4917]: error: PAM: authentication error for root from meizu-mx4-pro.lan

Could not load host key: /etc/ssh/ssh_host_dsa_key，那就生成这个key：
root@rpi2:/usr/local # ssh-keygen -t dsa -f /etc/ssh/ssh_host_dsa_key
Generating public/private dsa key pair.
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /etc/ssh/ssh_host_dsa_key.
Your public key has been saved in /etc/ssh/ssh_host_dsa_key.pub.
The key fingerprint is:
SHA256:0gV9unsS+HmqgE0j45aqtNQVhVsYNUiX2pgBbbmBLbM root@rpi2
The key's randomart image is:
+---[DSA 1024]----+
|   .*oB=o.       |
|   + @oo... .    |
|    =.@   .o     |
|   E *.o ..      |
|    o.+ S. .     |
|  ...B o. o      |
| o .= o  . +     |
|o .o   .  = o    |
|.o.     ...=     |
+----[SHA256]-----+

重新启动ssh服务：
root@rpi2:/usr/local # /etc/rc.d/sshd restart
Performing sanity check on sshd configuration.
Could not load host key: /etc/ssh/ssh_host_dsa_key
Stopping sshd.
Waiting for PIDS: 799.
Performing sanity check on sshd configuration.
Could not load host key: /etc/ssh/ssh_host_dsa_key
Starting sshd.



参考自：http://blog.163.com/zhengjiu_520/blog/static/3559830620118851822482/

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：https://jackxiang.com/post/8519/
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