ssh无密码登陆

fanyuanmail

以下做法在solaris 10,redhat as 5.0上测试通过。
hosta和hostb都必须同步完成以下操作,以hosta为例
================================================================
1、创建密钥对
[root@hosta /]# who am i
root     pts/1        2008-04-30 12:08 (172.16.10.220)
[root@hosta /]# cd ~/.ssh
[root@hosta .ssh]# ssh-keygen -t dsa
Generating public/private dsa key pair.
Enter file in which to save the key (/root/.ssh/id_dsa):
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /root/.ssh/id_dsa.
Your public key has been saved in /root/.ssh/id_dsa.pub.
The key fingerprint is:
0a:13:25:19:a2:59:2c:b1:49:e6:62:90:57:07:e5:f7 root@hosta
passphrase(密钥保护) 保留为空，否则使用ssh时将要求输入passphrase(密钥保护)
2、发布公钥和获取公钥
[root@hosta .ssh]# scp id_dsa.pub hostb:/root/.ssh/hosta.key.pub
root@hostb's password:
id_dsa.pub                                            100%  600     0.6KB/s   00:00   
[root@hosta .ssh]# scp hostb:/root/.ssh/id_dsa.pub /root/.ssh/hostb.key.pub
root@hostb's password:
id_dsa.pub                                            100%  600     0.6KB/s   00:00   
3、对公钥授权
[root@hosta .ssh]# cat id_dsa.pub >>authorized_keys2
[root@hosta .ssh]# cat hostb.key.pub >>authorized_keys2
如果是ssh v1版本，比如solaris 9，就使用authorized_keys文件
4、使用密钥对登录
[root@hosta .ssh]# ssh hostb
Last login: Sun Apr 27 00:04:49 2008 from 172.16.10.220
[root@hostb ~]# exit
logout
Connection to hostb closed.
5、查看日志
[root@hosta .ssh]# more /var/log/secure
Apr 27 10:26:47 hosta sshd[9309]: Accepted password for root from 172.16.10.220 port 239
5 ssh2
Apr 27 10:26:47 hosta sshd[9309]: pam_unix(sshd:session): session opened for user root b
y (uid=0)
Apr 27 10:41:51 hosta sshd[12195]: Accepted password for root from 172.16.10.220 port 24
08 ssh2
Apr 27 10:41:51 hosta sshd[12195]: pam_unix(sshd:session): session opened for user root
by (uid=0)
Apr 27 12:42:15 hosta sshd[3331]: pam_unix(sshd:session): session closed for user root
Apr 27 13:08:32 hosta sshd[26563]: Accepted password for root from 172.16.10.2 port 4324
7 ssh2
Apr 27 13:08:32 hosta sshd[26563]: pam_unix(sshd:session): session opened for user root
by (uid=0)
Apr 27 13:08:33 hosta sshd[26563]: pam_unix(sshd:session): session closed for user root
Apr 27 13:08:52 hosta sshd[26607]: Accepted password for root from 172.16.10.2 port 4324
8 ssh2
Apr 27 13:08:52 hosta sshd[26607]: pam_unix(sshd:session): session opened for user root
by (uid=0)
Apr 27 13:08:52 hosta sshd[26607]: pam_unix(sshd:session): session closed for user root
Apr 27 13:09:15 hosta sshd[26658]: Accepted password for root from 172.16.10.2 port 4324
9 ssh2
Apr 27 13:09:15 hosta sshd[26658]: pam_unix(sshd:session): session opened for user root
by (uid=0)
Apr 27 13:09:15 hosta sshd[26658]: pam_unix(sshd:session): session closed for user root
Apr 27 13:09:25 hosta sshd[26689]: Accepted password for root from 172.16.10.2 port 4325
0 ssh2
Apr 27 13:09:25 hosta sshd[26689]: pam_unix(sshd:session): session opened for user root
by (uid=0)
Apr 27 13:09:25 hosta sshd[26689]: pam_unix(sshd:session): session closed for user root
Apr 27 13:51:27 hosta sshd[29770]: Accepted password for root from 172.16.10.220 port 4248 ssh2
Apr 27 13:51:27 hosta sshd[29770]: pam_unix(sshd:session): session opened for user root by (uid=0)
Apr 27 13:53:54 hosta sshd[29770]: pam_unix(sshd:session): session closed for user root
Apr 27 15:13:48 hosta sshd[9309]: pam_unix(sshd:session): session closed for user root
Apr 27 15:22:20 hosta sshd[12195]: pam_unix(sshd:session): session closed for user root
Apr 27 23:37:48 hosta sshd[7798]: Accepted password for root from 172.16.10.220 port 4948 ssh2
Apr 27 23:37:48 hosta sshd[7798]: pam_unix(sshd:session): session opened for user root by (uid=0)
Apr 28 04:30:58 hosta sshd[7798]: pam_unix(sshd:session): session closed for user root
Apr 30 12:08:32 hosta sshd[15039]: Accepted password for root from 172.16.10.220 port 1637 ssh2
Apr 30 12:08:32 hosta sshd[15039]: pam_unix(sshd:session): session opened for user root by (uid=0)
Apr 30 12:11:05 hosta useradd[15282]: new group: name=mysql, GID=503
Apr 30 12:11:05 hosta useradd[15282]: new user: name=mysql, UID=503, GID=503, home=/home/mysql, shell=/bin/bash
Apr 30 12:22:18 hosta sshd[16164]: Accepted password for root from 172.16.10.2 port 47224 ssh2
Apr 30 12:22:18 hosta sshd[16164]: pam_unix(sshd:session): session opened for user root by (uid=0)
Apr 30 12:22:18 hosta sshd[16164]: pam_unix(sshd:session): session closed for user root
6、查看ssh的详细操作记录(ssh -v, scp -v or sftp -v ...)
[root@hosta .ssh]# scp -v /root/install.log hostb:/root
Executing: program /usr/bin/ssh host hostb, user (unspecified), command scp -v -t /root
OpenSSH_4.3p2, OpenSSL 0.9.8b 04 May 2006
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Applying options for *
debug1: Connecting to hostb [172.16.10.2] port 22.
debug1: Connection established.
debug1: permanently_set_uid: 0/0
debug1: identity file /root/.ssh/identity type -1
debug1: identity file /root/.ssh/id_rsa type -1
debug1: identity file /root/.ssh/id_dsa type 2
debug1: Remote protocol version 2.0, remote software version OpenSSH_4.3
debug1: match: OpenSSH_4.3 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_4.3
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-cbc hmac-md5 none
debug1: kex: client->server aes128-cbc hmac-md5 none
debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024

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kll99

你好，我使用你的方法在solaris上测试没有通过，使用了另外的方法测试发现存在问题，请见http://bbs.chinaunix.net/forum.php?mod=viewthread&tid=3724051。
劳驾帮忙看看什么原因，谢谢