You (root) are not allowed to access to (crontab) because of pam configuration

[root@mylnx2 ~]# crontab -l

Authentication token is no longer valid; new one required

You (root) are not allowed to access to (crontab) because of pam configuration.

[root@mylnx2 ~]#

查看了一下/etc/pam.d/crond，仔细检查后发现我们设置了密码过期策略，当密码过期后，作业由于权限认证是不会执行的，这个可以参考Linux账号密码过期会导致crontab作业不能执行和 Linux账户密码过期安全策略设置

[root@mylnx2 ~]# more /etc/pam.d/crond

#

# The PAM configuration file for the cron daemon

#

#

# No PAM authentication called, auth modules not needed

account    required   pam_access.so

account    include   password-auth

session    required   pam_loginuid.so

session    include   password-auth

auth     include   password-auth

想必细心的人发现上面截图里面都是root账号， 那如果密码过期了后，你怎么使用root登录呢？ 其实这里我们访问服务器通过Jump Server（跳板机）登录，登录后使用sudo su - 切换到root账号，所以没有遇到类似下面需要修改密码的通知。

You are required to change your password immediately (password aged)

Last login: Wed Jun 28 15:42:13 2017 from xxx.xxx.xxx.xxx

Changing password for root.

(current) UNIX password:

You (root) are not allowed to access to (crontab) because of pam configuration

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