ubuntu 配置SSH

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1.安装

lord@dell:~$ sudo apt-get install ssh

2设置无密码登录

lord@dell:~$ ssh-keygen -t dsa -P '' -f ~/.ssh/id_dsaGenerating public/private dsa key pair.Your identification has been saved in /home/lord/.ssh/id_dsa.Your public key has been saved in /home/lord/.ssh/id_dsa.pub.The key fingerprint is:c6:82:68:e8:e0:d2:93:b5:51:70:16:f6:6a:fa:41:66 lord@dellThe key's randomart image is:+--[ DSA 1024]----+|    . =.         ||     = .         ||      . .        || . . o o         ||o o + E S        ||+o o O o         ||.o+ o .          ||.  . . .         ||      .          |+-----------------+lord@dell:~$

ssh-keygen是生成密钥的命令

-t 密钥类型参数，dsa是一种密钥类型

-P密钥参数，设置为 ‘’

～是当前用户的意思，我的实验环境用户名为lord

由上图命令及结果可以看出身份信息存入到了/home/lord/.ssh/id_dsa下，公钥存入/home/lord/.ssh/id_dsa.pub

（如何查看这些文件？.ssh文件为隐藏文件夹，Ctrl + H可以显示隐藏文件夹）

3.验证安装

lord@dell:~$ ssh -versionOpenSSH_5.8p1 Debian-7ubuntu1, OpenSSL 1.0.0e 6 Sep 2011Bad escape character 'rsion'.lord@dell:~$

lord@dell:~$ ssh localhostlord@localhost's password: Welcome to Ubuntu 11.10 (GNU/Linux 3.0.0-12-generic i686) * Documentation:  https://help.ubuntu.com/Last login: Wed Nov 16 14:14:38 2011 from localhostlord@dell:~$