Linux SSH key failure

Handling/etc/ssh/ssh_host_rsa_key Failure issues
Handling/etc/ssh/ssh_host_rsa_key Failure issues
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@ warning:unprotected PRIVATE KEY file! @
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Permissions 0777 for '/etc/ssh/ssh_host_rsa_key ' is too open.
It is recommended this your private key files are not accessible by others.
This private key would be ignored.
Bad Permissions:ignore key:/etc/ssh/ssh_host_rsa_key
Could not load host key:/etc/ssh/ssh_host_rsa_key
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@ warning:unprotected PRIVATE KEY file! @
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Permissions 0777 for '/etc/ssh/ssh_host_dsa_key ' is too open.
It is recommended this your private key files are not accessible by others.
This private key would be ignored.
Bad Permissions:ignore key:/etc/ssh/ssh_host_dsa_key
Could not load host key:/etc/ssh/ssh_host_dsa_key
Disabling Protocol version 2. Could Not load host key
Sshd:no Hostkeys available--exiting.
[FAILED]

If a bug has occurred

1. Backup/etc/ssh/ssh_host_rsa_key
sudo cp/etc/ssh/ssh_host_rsa_key ~/etc/ssh/ssh_host_rsa_key

2. Backup/etc/ssh/ssh_host_dsa_key
sudo cp/etc/ssh/ssh_host_dsa_key ~/etc/ssh/ssh_host_dsa_key

3. Delete the original two configuration files
sudo rm-rf/etc/ssh/ssh_host_rsa_key; sudo rm-rf/etc/ssh/ssh_host_dsa_key

4. Restart the SSHD service
Sudo/etc/init.d/sshd restart

5. If the following error occurs, then configure the
stopping sshd: [FAILED]
Starting sshd:/var/empty/sshd must is owned by root and not group or world-writable.
[FAILED]

6. Authorizing configuration Files
chmod 744/var/empty/sshd
chmod u+rwx/var/empty/ssh/etc/local~
Note: If the owner of the/VAR/EMPTY/SSH/ETC has EXECUTE permission sshd also cannot start successfully, need to remove the permissions

7. Start the SSHD service again if this is the case

This is correct
stopping sshd:                                               [  ok ]
Starting sshd:                                                [  ok ]

If that's the case
stopping sshd: [FAILED]
Starting sshd: [OK]
Start again or this will be problematic and need to be configured again

8. View the listening state of the sshd process
Like what:
[Email protected] ~]# NETSTAT-NATPL | grep sshd
TCP 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 27641/sshd # #正确的显示方式
TCP 0 0 172.28.88.67:22 172.28.88.68:50692 established 19493/sshd # #需要kill
TCP 0 0 172.28.88.67:22 172.28.88.78:56349 established 25221/sshd # #需要kill
TCP 0 0 172.28.88.67:22 172.28.88.208:50812 established 20536/sshd # #需要kill
TCP 0 172.28.88.67:22 172.28.88.18:52873 established 27550/sshd # #需要kill
TCP 0 0::: $:::* LISTEN 27641/sshd # #正确的显示方式

9. It's not a problem to start again.

stopping sshd: [OK]
Starting sshd: [OK]

This article is from the "Night Cold" blog, please be sure to keep this source http://miaopan.blog.51cto.com/4233458/1559106

Linux SSH key failure