You tried setting up public key, passwordless authentication on your Linux box, but sshd keeps asking for a password and ignores all the keys you send.
You check the logs and there's a message like this one type=AVC msg=audit(1392479922.440:24765601): avc: denied { read } for pid=13960 comm="sshd" name="authorized_keys" dev=dm-0 ino=786507 scontext=unconfined_u:system_r:sshd_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:httpd_sys_content_t:s0 tclass=file