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。