only root without password

[Fede Rico]

Hi all,
I have a very strange problem with the public key authentication with 2
machines.
I generated the key, configured the authorized_keys etc.. etc.. This is
all ok, now:
The ssh works without the password for the "root" user, any other user
cannot use the key and ssh ask me for the password !!
I cannot understand why only the root is able to connect without the
password. So, the ssh works and I think there is a wrong config file but I
cannt find it !!!!
Just to understand the issue, let's see the strace of sshd daemon. As you
can see when the root connect the sshd reads the key file, but when
another user try to connect, sshd open the file and the close it without
read the key......
Any ideas??

Federico

***********
for the root:
26728 read(4, "root:x:0:rootnbin:x:1:root,bin,d"..., 4096) = 946
26728 read(4, "", 4096) = 0
26728 close(4) = 0
26728 munmap(0xb7dce000, 4096) = 0
26728 setgroups32(7, [0, 1, 2, 3, 4, 6, 10]) = 0
26728 getgroups32(0, NULL) = 7
26728 getgroups32(7, [0, 1, 2, 3, 4, 6, 10]) = 7
26728 setgroups32(7, [0, 1, 2, 3, 4, 6, 10]) = 0
26728 setresgid32(-1, 0, -1) = 0
26728 setresuid32(-1, 0, -1) = 0
26728 stat64("/root/.ssh/authorized_keys", {st_mode=S_IFREG|0600,
st_size=1664, ...}) = 0
26728 open("/root/.ssh/authorized_keys", O_RDONLY|O_LARGEFILE) = 4
26728 lstat64("/root", {st_mode=S_IFDIR|0750, st_size=4096, ...}) = 0
26728 lstat64("/root/.ssh", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
26728 lstat64("/root/.ssh/authorized_keys", {st_mode=S_IFREG|0600,
st_size=1664, ...}) = 0
26728 lstat64("/root", {st_mode=S_IFDIR|0750, st_size=4096, ...}) = 0
26728 fstat64(4, {st_mode=S_IFREG|0600, st_size=1664, ...}) = 0
26728 stat64("/root/.ssh", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
26728 stat64("/root", {st_mode=S_IFDIR|0750, st_size=4096, ...}) = 0
26728 fstat64(4, {st_mode=S_IFREG|0600, st_size=1664, ...}) = 0
26728 mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS,
-1, 0) = 0xb7dce000
26728 read(4, "ssh-dss AAAAB3NzaC1kc3MAAACBALxI"..., 4096) = 1664
26728 setresuid32(-1, 0, -1) = 0

***************
and for another user:
23996 read(4, "root:x:0:rootnbin:x:1:root,bin,d"..., 4096) = 946
23996 read(4, "", 4096) = 0
23996 close(4) = 0
23996 munmap(0xb7e7c000, 4096) = 0
23996 setgroups32(2, [501, 502]) = 0
23996 getgroups32(0, NULL) = 2
23996 getgroups32(2, [501, 502]) = 2
23996 setgroups32(2, [501, 502]) = 0
23996 setresgid32(-1, 501, -1) = 0
23996 setresuid32(-1, 501, -1) = 0
23996 stat64("/u1/oracle/.ssh/authorized_keys", {st_mode=S_IFREG|0644,
st_size=836, ...}) = 0
23996 open("/u1/oracle/.ssh/authorized_keys", O_RDONLY|O_LARGEFILE) = 4
23996 lstat64("/u1", {st_mode=S_IFDIR|0777, st_size=4096, ...}) = 0
23996 lstat64("/u1/oracle", {st_mode=S_IFDIR|0774, st_size=4096, ...}) = 0
23996 lstat64("/u1/oracle/.ssh", {st_mode=S_IFDIR|0700, st_size=4096,
...}) = 0
23996 lstat64("/u1/oracle/.ssh/authorized_keys", {st_mode=S_IFREG|0644,
st_size=836, ...}) = 0
23996 lstat64("/u1", {st_mode=S_IFDIR|0777, st_size=4096, ...}) = 0
23996 lstat64("/u1/oracle", {st_mode=S_IFDIR|0774, st_size=4096, ...}) = 0
23996 fstat64(4, {st_mode=S_IFREG|0644, st_size=836, ...}) = 0
23996 stat64("/u1/oracle/.ssh", {st_mode=S_IFDIR|0700, st_size=4096, ...})
= 0
23996 stat64("/u1/oracle", {st_mode=S_IFDIR|0774, st_size=4096, ...}) = 0
23996 close(4) = 0
23996 time(NULL) = 1229609500
23996 open("/etc/localtime", O_RDONLY) = 4