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<p><FONT class=normalfont><B><font color=blue>ssh2的安装与配置</font></B></FONT><BR><FONT class=smallfont color=#ff9900>2004-04-23 15:18 pm</FONT><BR><FONT class=normalfont>作者：作者<br>来自：Linux知识宝库<br>联系方式：无名<br><br> ssh（secure shell client)是用来登录远程系统执行命令的一种程序。它可以取代rlogin和rsh并且可以在一个不安全的网络环境中为服务器与客户机提供安全的、加密的连接。为了服务器的安全，任何称职的 管理员都应该使用ssh，下面就来介绍一下ssh的安装和配置过程。<br>
<br>
1 软件获取<br>
<br>
<br>
http://210.74.166.205/pub/security/ssh/ssh-secure-shell-2.1.0-noncommercial.tar.gz<br>
<br>
<br>
2 安装<br>
<br>
# tar zxvf ssh-2.0.13.tar.gz<br>
# cd ssh-2.0.13<br>
<br>
# ./configure<br>
# make<br>
# make install<br>
<br>
<br>
默认情况下，ssh将被安装在/usr/local/下。<br>
<br>
3 启动服务器端<br>
<br>
在提示符下运行：<br>
<br>
# /usr/local/sbin/sshd2<br>
<br>
为了在系统重新启动之后可以自动执行上述命令，还应该把上面的命令添加到/etc/rc.d/rc.local中去。之后可以在命令行中运行ps x|grep sshd命令，看看有没有类似下面的输出，如果有那么恭喜你了：<br>
<br>
213 ?? Is 0:00.46 /usr/local/sbin/sshd2<br>
<br>
4 客户端<br>
<br>
在linux/unix下，安装好这个ssh就有了客户端程序了。你可以选择是用系统的password还是用ssh2的passphrase,如果选择使用ssh的passphrase的话，需要运行下面的命令：<br>
<br>
# ssh-keygen2<br>
Generating 1024-bit dsa key pair<br>
6 Oo.oOo.oOoo.<br>
Key generated.<br>
1024-bit dsa, root@yourdomain.com, Thu Jun 22 2000 14:33:39 +0800<br>
Passphrase : <br>
Again : <br>
Private key saved to /root/.ssh2/id_dsa_1024_a<br>
Public key saved to /root/.ssh2/id_dsa_1024_a.pub<br>
<br>
之后<br>
<br>
# cd ~/.ssh2<br>
<br>
按照下面的格式创建两个文件：<br>
<br>
# vi identification 加入：<br>
<br>
IdKey id_dsa_1024_a<br>
<br>
在服务器的相应用户的~/.ssh2目录中<br>
<br>
# vi authorization 加入：<br>
<br>
Key id_dsa_1024_a.pub<br>
<br>
然后在客户端运行：<br>
<br>
# ssh youdomain.com <br>
<br>
Host key not found from database.<br>
Are you sure you want to continue connecting (yes/no)? yes<br>
Host key saved to /home/chenlf/.ssh2/hostkeys/key_22_210.74.166.253.pub<br>
host key for 210.74.166.253, accepted by chenlf Thu Jun 22 2000 14:54:01 +0800<br>
Passphrase for key "/home/chenlf/.ssh2/chenlf" with comment "1024-bit dsa,chenlf@ns1.cnuol.com, Wed May 17 2000 15:13:17+0800":<br>
<br>
在“：”后输入你的passphrase就可以了！ <br>
<br>
Windows下可以使用Secure CRT 3.0。
</FONT><br>
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