SSH 无法自动登录

在client机， 用命令ssh-keygen -t rsa 生成id_rsa.pub.
然后分别拷贝到server机的test1 和 test2 的主目录的.ssh下面， cat id_rsa.pub > authorized_keys.

现在的问题是，我在client可以顺利的用test1 SSH，却不能用test2 SSH
# ssh test1@server
#                         (不需要密码, 登录成功)

# ssh test2@server
password:           (需要密码登录)

请问：同样的操作，为什么有不一样的结果，为什么test2认证无效，需要提供密码登录？

我在server机上看了一下两个用户test1和test2的设置，唯一发现的就是他们的home directory不一样：
test1@server> cd ~
test1@server> pwd
/home/test1

test2@server> cd ~
test2@server> pwd
/app/user/test2

test2的主目录好像不是默认的主目录(被更改了)，请问有可能是这样的原因吗？怎么解决(不重设主目录的情况下)？

新注册用户，暂没有积分提供，望不吝赐教。

检查对方的主机的authorized_keys是否有本机的信息

大哥，怎样检查啊？我不是已经在test2用户主目录的.ssh目录下 cat id_rsa.pub > authorized_keys 了吗？

这是部分debug log
$ ssh -vvv test2@server

.................
debug1: Authentications that can continue: publickey,password,keyboard-interactive
debug3: start over, passed a different list publickey,password,keyboard-interactive
debug3: preferred publickey,keyboard-interactive,password
debug3: authmethod_lookup publickey
debug3: remaining preferred: keyboard-interactive,password
debug3: authmethod_is_enabled publickey
debug1: Next authentication method: publickey
debug1: Trying private key: /home/dmlusr/.ssh/identity
debug3: no such identity: /home/dmlusr/.ssh/identity
debug1: Offering public key: /home/dmlusr/.ssh/id_rsa
debug3: send_pubkey_test
debug2: we sent a publickey packet, wait for reply
debug1: Authentications that can continue: publickey,password,keyboard-interactive
debug1: Trying private key: /home/dmlusr/.ssh/id_dsa
debug3: no such identity: /home/dmlusr/.ssh/id_dsa
debug2: we did not send a packet, disable method
debug3: authmethod_lookup keyboard-interactive
debug3: remaining preferred: password
debug3: authmethod_is_enabled keyboard-interactive
debug1: Next authentication method: keyboard-interactive
debug2: userauth_kbdint
debug2: we sent a keyboard-interactive packet, wait for reply
debug1: Authentications that can continue: publickey,password,keyboard-interactive
debug3: userauth_kbdint: disable: no info_req_seen
debug2: we did not send a packet, disable method
debug3: authmethod_lookup password
debug3: remaining preferred:
debug3: authmethod_is_enabled password
debug1: Next authentication method: password
test2@server's password:

你这样
cat id_rsa.pub > authorized_keys
等于把上次的认证信息覆盖了，当然另外一个就不能用了，改为

cat id_rsa.pub >> authorized_keys.
即可

或者直接用
ssh-copy-id -i id_rsa.pub IP地址
就不用自己又拷贝又cat的了