You (oracle) are not allowed to access to (crontab) becaus of pam configuration.
问题描述
现场同事反馈磁盘撑爆，分析发下归档和rman备份目录空间占用最多。
分析过程
oracle用户下查看计划任务时，报错如下：
--查看计划任务
[oracle@crm-ethanDB ~]$ crontab -l
You (oracle) are not allowed to access to (crontab) because of pam configuration.先前使用过crontab命令配置定期删除归档和rman定时备份的任务，问了下运维同事，最近也没有任何改动。
按照常规流程排查下，顺序如下：
1)查看/bin/crontab的SSID位是否标记S
2)检查/etc/cron* 是否设置了.deny文件限制；
3)检查PAM模块，cat /etc/pam.d/crond，文件中配置是否正常
4)查看系统日志cat /var/log/secure的错误信息
5)查看oracle用户密码过期
查看/bin/crontab的SSID位是否标记S
[root@crm-sbldbdg ~]# ll /bin/crontab
-rwsr-xr-x. 1 root root 57664 Oct 16 2017 /bin/crontab检查/etc/cron 是否设置了.deny文件限制*
[root@crm-sbldbdg ~]# ll -dl /etc/cron*
drwxr-xr-x. 2 root root 4096 Jan 13 2020 /etc/cron.d
drwxr-xr-x. 2 root root 4096 Jan 13 2020 /etc/cron.daily
-rw-------. 1 root root 0 Oct 16 2017 /etc/cron.deny
drwxr-xr-x. 2 root root 4096 Jan 13 2020 /etc/cron.hourly
drwxr-xr-x. 2 root root 4096 Dec 28 2013 /etc/cron.monthly
-rw-r--r--. 1 root root 451 Dec 28 2013 /etc/crontab
drwxr-xr-x. 2 root root 4096 Dec 28 2013 /etc/cron.weekly有/etc/cron.deny文件，但没有实际内容，也就不存在什么限制。
注意：
如果存在cron.allow文件，以cron.allow文件优先；如果cron.allow和cron.deny都存在，以cron.allow文件优先；如果只有cron.deny 文件，只能以cron.deny 文件为准。
检查PAM模块，cat /etc/pam.d/crond，文件中配置是否正常
[root@crm-sbldbdg ~]# cat /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查看系统日志cat /var/log/secure的错误信息
Mar 3 16:54:01 crm-ethanDB crond[103891]: pam_unix(crond:account): expired password for user oracle (password aged)
Mar 3 16:54:25 crm-ethanDB su: pam_unix(su-l:session): session opened for user root by root2(uid=1001)
Mar 3 16:55:47 crm-ethanDB crontab: pam_unix(crond:account): expired password for user oracle (password aged)Chage命令查看oracle用户密码有效期
--查看oracle用户密码有效期
[root@crm-sbldbdg ~]# chage -l oracle
Last password change : Aug 31, 2020
Password expires : Feb 27, 2023
Password inactive : never
Account expires : never
Minimum number of days between password change : 0
Maximum number of days between password change : 90
Number of days of warning before password expires : 7Password expires : Feb 27, 2023部分，显示oracle的密码到期时间为Feb 27, 2023。
问题原因
oracle账号密码到期，导致oracle下的crontab的定时任务不能正常进行，所以产生如下报错：
[oracle@crm-ethanDB ~]$ crontab -l
You (oracle) are not allowed to access to (crontab) because of pam configuration.解决办法
修改oracle密码永不过期
--修改oracle密码永不过期
[root@crm-sbldbdg ~]# chage -M 99999 oracle
--chage -l oracle查看命令，再看密码过期时间为never
[root@crm-sbldbdg ~]# chage -l oracle
Last password change : Aug 31, 2020
Password expires : never
Password inactive : never
Account expires : never
Minimum number of days between password change : 10
Maximum number of days between password change : 99999
Number of days of warning before password expires : 7Minimum number of days between password change : 10
Maximum number of days between password change : 99999
Number of days of warning before password expires : 7经再次验证，oracle下的crontab命令可以正常编辑。
参考链接：排故篇 | You (oracle) are not allowed to access to (crontab) because of pam configuration-CSDN博客