Centos7,无法登陆,输入用户,未提示输入密码,直接报"Login incorrect"：

系统是Centos7，在登陆界面，输入完用户名敲回车后，没有提示我输入密码，就直接报“Login incorrect”了：

CentOS Linux 7 (core)

Kernel 3.10.0-327.eel7.x86_64 on an x86_64

localhost login：root

Login incorrect

Login incorrect

Login incorrect

此问题是由于系统的某些更新引起pam.d/login的变化。我把上面/etc/pam.d/login中的两个postlogin以及pam_loginuid.so一行注释掉就OK了，暂时不知道这两个模块的验证策略如何。

[root@localhost ~]# cat /etc/pam.d/login 

#%PAM-1.0
auth [user_unknown=ignore success=ok ignore=ignore default=bad] pam_securetty.so
auth       substack     system-auth
# auth       include      postlogin
account    required     pam_nologin.so
account    include      system-auth
password   include      system-auth
# pam_selinux.so close should be the first session rule
session    required     pam_selinux.so close
# session    required     pam_loginuid.so
session    optional     pam_console.so
# pam_selinux.so open should only be followed by sessions to be executed in the user context
session    required     pam_selinux.so open
session    required     pam_namespace.so
session    optional     pam_keyinit.so force revoke
session    include      system-auth
# session    include      postlogin
-session   optional     pam_ck_connector.so