解決cron無法運行報錯：FAILED to authorize user with PAM (Module is unknown)

查看cron運行日誌
tail -f /var/log/cron

報如下錯誤：

May  8 10:14:01 localhost crond[9399]: (root) FAILED to authorize user with PAM (Module is unknown)
May  8 10:14:01 localhost crond[9400]: (root) FAILED to authorize user with PAM (Module is unknown)

網上有如下解決方法：
禁用SELinux,可以使用getenforce命令查看是否禁用。
修改/etc/cron.allow，添加
root
myuser

修改/etc/pam.d/crond，把把所有required改成sufficient，這個可能對非root用戶管用。
#
# 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

最終解決辦法：
重啓crond服務

/etc/init.d/crond restart
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原文鏈接：https://blog.csdn.net/lilongsy/article/details/71404119