下載安裝檔案:
1，在https://launchpad.net/ubuntu/precise/i386/openssh-client/1:5.9p1-5ubuntu1 下載 openssh-client_5.9p1-5ubuntu1_i386.deb
2，在https://launchpad.net/ubuntu/precise/i386/openssh-server/1:5.9p1-5ubuntu1 下載 openssh-server_5.9p1-5ubuntu1_i386.deb
3，在https://launchpad.net/ubuntu/precise/i386/ssh/1:5.9p1-5ubuntu1 下載 ssh_5.9p1-5ubuntu1_all.deb
安裝第一個檔案：
root@ubuntu:~/downloads# sudo dpkg -i openssh-client_5.9p1-5ubuntu1_i386.deb
安裝第二個檔案
root@ubuntu:~/downloads# sudo dpkg -i openssh-server_5.9p1-5ubuntu1_i386.deb
安裝第三個檔案
root@ubuntu:~/downloads# sudo dpkg -i ssh_5.9p1-5ubuntu1_all.deb
測試。
root@ubuntu:~/downloads# ssh localhost
The authenticity of host 'localhost (127.0.0.1)' can't be established.
ECDSA key fingerprint is 2e:e9:11:4f:dc:f7:fc:54:a1:4b:06:e4:85:5e:87:c2.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added 'localhost' (ECDSA) to the list of known hosts.
Welcome to Ubuntu 12.04 LTS (GNU/Linux 3.2.0-23-generic-pae i686)
* Documentation: https://help.ubuntu.com/
Last login: Mon May 28 00:44:32 2012