ssh_exchange_identification: Connection closed by remote host

使用SCP复制一个文件报如此错

[highgo@node1 hgdb]$ scp data.tar highgo@node2:/usr/local/cluster/hgdb/

ssh_exchange_identification: Connection closed by remote host

lost connection

查看ssh连接情况

[highgo@node1 hgdb]$ ssh node2 date

ssh_exchange_identification: Connection closed by remote host

查看NODE2

[root@node2 ~]# su - aaa

-bash: /dev/null: Permission denied

-bash: /dev/null: Permission denied

-bash: /dev/null: Permission denied

-bash: /dev/null: Permission denied

-bash: /dev/null: Permission denied

-bash: /dev/null: Permission denied

检查/dev/null

[root@node2 ~]# ll /dev/null

ls: cannot access /dev/null: No such file or directory

对比node1

[root@node1 ~]# ll /dev/null

crw-rw-rw- 1 root root 1, 3 Dec 19 07:05 /dev/null

重建节点2的/dev/null

[root@node2 ~]# rm -rf /dev/null && mknod -m 0666 /dev/null c 1 3

You have new mail in /var/spool/mail/root

[root@node2 ~]# ll /dev/null

crw-rw-rw- 1 root root 1, 3 Dec 19 07:32 /dev/null

此时依然不行

[highgo@node2 ~]$ ssh node1 date

Host key verification failed.

删掉.ssh路径下所有文件重新配置ssh互信，无效

检查tty,pty

[root@node2 .ssh]# ll /dev/tty

ls: cannot access /dev/tty: No such file or directory

[root@node2 .ssh]# ll /dev/pty

ls: cannot access /dev/pty: No such file or directory

创建

[root@node2 .ssh]# /sbin/MAKEDEV pty

[root@node2 .ssh]# /sbin/MAKEDEV tty

测试

[root@node2 .ssh]# ssh node1 date

The authenticity of host 'node1 (192.168.56.120)' can't be established.

RSA key fingerprint is be:77:2a:67:00:85:7a:19:73:8c:48:5f:c5:95:ae:ee.

Are you sure you want to continue connecting (yes/no)?

搞定