#SSH無密碼登錄要使用公鑰與私鑰,Linux下可以用ssh-keygen生成公鑰/私鑰; #Server1(192.168.4.101)Server2(192.168.4.102)Server1通過ssh免密碼登錄Server2; #Server1生成.ssh目錄 [root@server1 /]# ssh 192.168.4.102 The authenticity of host '192.168.4.102 (192.168.4.102)' can't be established. RSA key fingerprint is 01:ac:84:3f:a5:ae:2d:a6:f4:68:f6:3f:e4:6c:33:ec. Are you sure you want to continue connecting (yes/no)? yes Warning: Permanently added '192.168.4.102' (RSA) to the list of known hosts. [email protected]'s password: #ctrl+c結束掉 [root@server1 /]# #Server2生成.ssh目錄 [root@server2 /]# ssh 192.168.4.101 The authenticity of host '192.168.4.101 (192.168.4.101)' can't be established. RSA key fingerprint is 18:4c:a2:18:43:36:57:15:ea:87:6c:20:19:99:e1:b8. Are you sure you want to continue connecting (yes/no)? yes Warning: Permanently added '192.168.4.101' (RSA) to the list of known hosts. [email protected]'s password: #ctrl+c結束掉 [root@server2 /]# #Server1生成公鑰/私鑰 [root@server1 /]# ssh-keygen -t rsa Generating public/private rsa key pair. Enter file in which to save the key (/root/.ssh/id_rsa): Enter passphrase (empty for no passphrase): Enter same passphrase again: Your identification has been saved in /root/.ssh/id_rsa. Your public key has been saved in /root/.ssh/id_rsa.pub. The key fingerprint is: f4:45:f3:dc:f8:65:28:17:a8:e3:0a:84:24:ca:ea:c9 [email protected] The key's randomart p_w_picpath is: +--[ RSA 2048]----+ | o.. | | . . ..+ = | |.. o . . .o * +| |.. . .. .o. o o.| |. . S... .| |. . . | |o . . . | | E . | | | +-----------------+ #將Server1公鑰複製到Server2並改名爲authorized_keys [root@server1 /]# scp /root/.ssh/id_rsa.pub [email protected]:/root/.ssh/authorized_keys [email protected]'s password: id_rsa.pub 100% 406 0.4KB/s 00:00 #從Server1登錄到Server2 [root@server1 /]# ssh 192.168.4.102 Last login: Sat Jul 11 01:19:59 2015 from 192.168.4.100 #直接免密碼登錄 [root@server2 ~]# #如果是普通用戶免密碼登錄也是相同的,用普通用戶登錄,然後在生成密鑰;
SSH認證免密碼登錄
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