Solution to the problem that Linux crontab timed operation Oracle does not execute (crontab environment variable problem)

Problem description ： Start the timing task oracle Table operation , But there's no problem executing the script manually , There is no result in the execution of scheduled tasks, and no feedback message is given

Solution ： With centos7 For example , First, make sure that the script can be executed manually , Then check that the /var/log/cron The next log , Check whether the scheduled task is started ; If not, check the scheduled task , Check if started /var/mail/oracle See if there is a mistake ;

General error reporting ： It's about environmental variables ;/etc/crontab see crontab environment variable ;env View system environment variables

Solution ： Add... On the front page of the script source /home/oracle/.bashrc（ Note that the path here is my path and needs to be changed by myself ）

---

20200330 Daily update

General execution source /home/oracle/.bashrc（ Or maybe /etc/profile; It mainly depends on what you set up at that time oracle Where are the environment variables set ; You can refer to linux Execution sequence of boot environment variables ） It's on the bash Executed in the script ; And then to /var/mail/ user name ; Check whether an error is reported , Scheduled tasks may require bash( instead of sh To execute the script )

---

20210501 Daily update
In execution python3 For timed tasks bash To nest sometimes not , So it can be used in scheduled tasks
source /etc/profile && command Realization , feasible