执行crontab [root@FMPVZABBIX mysql_backup]# tail -f /var/log/cron Jul 16 14:12:01 FMPVZABBIX crond[13308]: (root) PAM ERROR (Authentication token is no longer valid; new one required) Jul 16 14:12:01 FMPVZABBIX crond[13308]: (root) FAILED to authorize user with PAM (Authentication token is no longer valid; new one required) Jul 16 14:12:34 FMPVZABBIX crontab[13523]: (root) LIST (root) Jul 16 14:20:01 FMPVZABBIX crond[16530]: (root) PAM ERROR (Authentication token is no longer valid; new one required) Jul 16 14:20:01 FMPVZABBIX crond[16530]: (root) FAILED to authorize user with PAM (Authentication token is no longer valid; new one required)     [root@FMPVZABBIX ~]# chage -l root Last password change : Feb 10, 2018 Password expires : May 11, 2018 Password inactive : never Account expires : never Minimum number of days between password change : 1 Maximum number of days between password change : 90 Number of days of warning before password expires : 7     解决办法：  chage -M 9999 root     https://www.cnblogs.com/likingzi/p/6691320.html