SSH(Secure Shell)为一项创建在应用层和传输层基础上的安全协议，为计算机上的Shell提供安全的传输和使用环境。
通过SSH可以对所有传输的数据进行加密，也能够防止DNS欺骗和IP欺骗。
1. 安装ssh客户端和服务器
sudo apt-get install openssh-client
sudo apt-get install openssh-server
2. 修改配置
ssh默认的端口号是22，可以更改。
sudo vim /etc/ssh/ssh_config
#Port 22
3. 服务重启
sudo /etc/init.d/ssh stop
sudo /etc/init.d/ssh start
sudo /etc/init.d/ssh restart
4. Linux 连接
ssh username@ipaddress
tony@T:~$ ssh tony@192.168.1.107
tony@192.168.1.107's password:
Linux T 2.6.32-38-generic #85-Ubuntu SMP Wed Jan 25 13:59:45 UTC 2012 i686 GNU/Linux
Ubuntu 10.04.4 LTS
Welcome to Ubuntu!
* Documentation: https://help.ubuntu.com/
New release 'precise' available.
Run 'do-release-upgrade' to upgrade to it.
Last login: Fri Aug 5 21:18:35 2016 from 192.168.1.104
tony@T:~$
5. windows连接
使用putty软件进行连接
login as: tony
tony@192.168.1.107's password:
Linux T 2.6.32-38-generic #85-Ubuntu SMP Wed Jan 25 13:59:45 UTC 2012 i686 GNU/Linux
Ubuntu 10.04.4 LTS
Welcome to Ubuntu!
* Documentation: https://help.ubuntu.com/
New release 'precise' available.
Run 'do-release-upgrade' to upgrade to it.
Last login: Fri Aug 5 20:54:34 2016 from 192.168.1.104
tony@T:~$ ls
Author
Tony Liu
2016-8-5, Shenzhen