ssh登錄不用口令

ssh登錄不用口令

主機192.168.0.2
客戶機192.168.0.3
先在客戶機上執行以下步驟：
1.#cd /root/.ssh (進入到/root/.ssh/ 目錄下)
2.#ssh-keygen -d (產生ssh的公鑰和私鑰)
Generating public/private dsa key pair.
Enter file in which to save the key (/root/.ssh/id_dsa): (產生到何處.按Enter 就可以了)
Enter passphrase (empty for no passphrase): (要不要設定passwd.避免問我們按Enter 就可以了)
Enter same passphrase again: (再按一次Enter)
Your identification has been saved in /root/.ssh/id_dsa.
Your public key has been saved in /root/.ssh/id_dsa.pub.

此時目錄下會產生公鑰id_dsa.pub和私鑰id_dsa
現在要把id_dsa.pub丟到192.168.0.2 並且更名為 authorized_keys

3.#scp id_dsa.pub 192.168.0.2:/root/.ssh/authorized_keys
[email protected]'s password:
id_dsa.pub 100% |*****************************| 613 00:00

試試看 ssh 到server 應該就不用輸入密碼了
4.#ssh 192.168.0.2
#exit (記得離開)


疑問：
這樣操作後，客戶機可以直接連接主機了，連口令都不要了，而當初只是把客戶機上的id_dsa.pub拷入主機，這樣好象不×××全啊。