CentOS6.5配置ssh免密碼登入並解決仍然需要輸入密碼的問題
阿新 • • 發佈：2019-01-08
一、準備工作
id_rsa ：私鑰
id_rsa.pub ：公鑰
2.生成公鑰認證檔案，並更改許可權
1. 開啟本機的ssh的配置檔案
sudo vi /etc/ssh/sshd_configRSAAuthentication yes
PubkeyAuthentication yes
AuthorizedKeysFile .ssh/authorized_keysservice sshd restart[[email protected] ~]vi /etc/selinux/config4.附加：如果您的centos安裝好之後不能上網，即ping baidu.com時提示connect network is unreachable，很有可能是DHCP的問題，是要輸入 sudo dhclient 就可以了。將 SELINUX=enforcing 修改為 SELINUX=disabled
二、配置SSH免密碼登入
1. 生成公鑰和私鑰（只要一路回車就可以了）
[[email protected] ~]ssh-keygen -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key (/home/usera/.ssh/id_rsa):
Created directory '/home/usera/.ssh'.
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /home/usera/.ssh/id_rsa.
Your public key has been saved in /home/usera/.ssh/id_rsa.pub.
The key fingerprint is:
39:f2:fc:70:ef:e9:bd:05:40:6e:64:b0:99:56:6e:01 id_rsa ：私鑰
id_rsa.pub ：公鑰
2.生成公鑰認證檔案，並更改許可權
$cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys
[[email protected] ~]$chmod 700 ~/.ssh/
[[email protected] ~]$chmod 600 ~/.ssh/authorized_keys[[email protected] ~]$scp ~/.ssh/id_rsa.pub [email protected]:/home/id_rsa.pub
[[email protected] ~]$scp ~/.ssh/id_rsa.pub [email protected]:/home/id_rsa.pub[[email protected] ~]$ cd ~/.ssh
[[email protected] .ssh]$ ssh-copy-id -i id_rsa.pub "-p 22 [email protected]"
[[email protected] .ssh]$ ssh-copy-id -i id_rsa.pub "-p 22 [email protected]"
Now try logging into the machine, with "ssh '-p 22 [email protected]'", and check in:
.ssh/authorized_keys
to make sure we haven't added extra keys that you weren't expecting.