[root@1bcc1d3f9666 externalscripts]# /usr/sbin/sshd
Could not load host key: /etc/ssh/ssh_host_rsa_key 解決參考:http://blog.csdn.net/hyholine/article/details/7362073
Could not load host key: /etc/ssh/ssh_host_ecdsa_key 解決命令: ssh-keygen -t ecdsa -f /etc/ssh/ssh_host_ecdsa_key（https://linux.cn/article-4226-1.html）
Could not load host key: /etc/ssh/ssh_host_ed25519_key 解決命令:cd /etc/ssh && ssh-keygen -A
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解決linux中ssh登錄Warning:Permanently added (RSA) to the list of known hosts
遠程登錄==>
[root@i-nbje0lea .ssh]# ssh 192.168.9.10
Warning: Permanently added '192.168.9.10' (RSA) to the list of known hosts.
Last login: Fri Sep 25 15:37:49 2015 from 192.168.9.11
報Warning:Permanently added (RSA) to the list of known hosts錯誤
因：在執行ssh 時，沒在本機的~/.ssh下生成known_hosts文件。
解決方案：
# vi/etc/ssh/ssh_config //注意是客戶端設置文件
最后有兩行是
StrictHostKeyChecking no #登錄時是否詢問
UserKnownHostsFile /dev/null #表示隱藏known_hosts文件
兩行解釋如下:
StrictHostKeyChecking
If this flag is set to “yes”, ssh(1) will never automatically add host keys to the
~/.ssh/known_hosts file, and refuses to connect to hosts whose host key has changed.The default is “ask”.
UserKnownHostsFile
Specifies a file to use for the user host key database instead of ~/.ssh/known_hosts.
把這兩行注釋掉並保存文件
再次執行ssh 192.168.9.10
出現提示
[admin@i-nbje0lea .ssh]$ ssh 192.168.9.10
The authenticity of host '192.168.9.10 (192.168.9.10)' can't be established.
RSA key fingerprint is 50:e9:44:87:86:c3:0f:85:ab:41:5e:33:1e:5b:6a:c1.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '192.168.9.10' (RSA) to the list of known hosts.
Last login: Fri Sep 25 15:27:34 2015 from 192.168.9.11
輸入yes后，則可看到在/root/.ssh目錄下生成了known_hosts文件：
[root@host100.ssh]# ls
id_rsa id_rsa.pub known_hosts