Windows系统下使用putty连接远程Linux主机

Windows系统下使用putty连接远程Linux主机

可以在windows平台下使用putty连接远程linux主机。

如果putty提示“Connection refused”，那么可能是远程主机没有安装OpenSSH。可以通过命令

# rpm -qa openssh

# rpm -qa openssh-server

查看是否安装OpenSSH。如果没有，需自行安装。一般系统安装盘中都有OpenSSH的安装软件包。

如果已经安装了OpenSSH，那么可能的原因就是没有启动SSH了。这时候的情况一般如下：

# /usr/sbin/sshd

系统提示“Could not load host key: /etc/ssh/ssh_host_key

Could not load host key: /etc/ssh/ssh_host_rsa_key

Could not load host key: /etc/ssh/ssh_host_dsa_key

Disabling protocol version 1. Could not load host key

Disabling protocol version 2. Could not load host key

sshd: no hostkeys available — exiting”

大致的意思就是需要某个key什么的。

解决办法如下：

#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:

xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx root@localhost.localdomain

#ssh-keygen -t rsa -f /etc/ssh/ssh_host_rsa_key

Generating public/private rkey pair.

Enter passphrase (empty for no passphrase):

Enter same passphrase again:

Your identification has been saved in /etc/ssh/ssh_host_rsa_key.

Your public key has been saved in /etc/ssh/ssh_host_dsa_rey.pub.

root@localhost.localdomain

#/usr/sbin/sshd

这时候，就可以在windows底下使用putty连接这台linux主机了。