今天客户反映一个问题，ssh不上自己的服务器了，进机房radhat linux本地登录(3级别)的时候发现输入root敲回车的时候出现如下提示：

    Your account is locked.Maximum amount of failed attempts was reached.

    好说，单用户模式下

      pam_tally2 -u root  （faillog -u root<查看/var/log/faillog内记录的登陆失败信息>）显示root用户登录失败记录的次数

      pam_tally2 -u root -r  （faillog -u root -r<重置/var/log/faillog内记录的登陆失败信息>）将登录错误数重置为0

    然后重启(5级别模式下)输入用户名密码，提示Authontication failed.

    继续单用户模式

      authconfig --disableldap --update

    顺便 vi /etc/pam.d/system-auth

#%PAM-1.0

# This file is auto-generated.

# User changes will be destroyed the next time authconfig is run.

auth        requeired     pam_tally2.so   deny=5 lock_time=30 even_deny_root root_unlock_time=30

auth        required      pam_env.so

auth        sufficient    pam_unix.so nullok try_first_pass

auth        requisite     pam_succeed_if.so uid >= 500 quiet

auth        required      pam_deny.so


account     required      pam_unix.so

account     sufficient    pam_localuser.so

account     sufficient    pam_succeed_if.so uid < 500 quiet

account     required      pam_permit.so


password    requisite     pam_cracklib.so try_first_pass retry=3 type=

password    sufficient    pam_unix.so sha512 shadow nullok try_first_pass use_au

thtok

password    required      pam_deny.so


session     optional      pam_keyinit.so revoke

session     required      pam_limits.so

session     [success=1 default=ignore] pam_succeed_if.so service in crond quiet 

use_uid

session     required      pam_unix.so

   罪魁祸首就是红色字体那一行，请将红色字体前面加个#j_0062.gif 所有问题都解决，系统用户可以正常登陆。