crontab相关文件[夹]的说明 摘自：Linux Recipes for Oracle DBAs
| file |
purpose |
| /etc/init.d/crond |
Starts the cron daemon in system boot. |
| /var/log/cron |
System messages related to the cron process. Useful for trou- bleshooting problems. |
| /var/spool/cron/ |
User crontab files are stored in the /var/spool/cron directory. |
| /etc/cron.allow |
Specifies users who can create a cron table. |
| /etc/cron.deny |
Specifies users who are not allowed to create a cron table. |
| /etc/crontab |
The system cron table that has commands to run scripts located in the following directories: /etc/cron.hourly, /etc/cron.daily, /etc/cron.weekly, and /etc/cron.monthly. |
| /etc/cron.d |
A directory that contains cron tables for jobs that need to run on a schedule other than hourly, daily, weekly, or monthly. |
| /etc/cron.hourly |
Directory that contains system scripts to run on an hourly basis. |
| /etc/cron.daily |
Directory that contains system scripts to run on a daily basis. |
| /etc/cron.weekly |
Directory that contains system scripts to run on a weekly basis. |
| /etc/cron.monthly |
Directory that contains system scripts to run on a monthly basis. |
When cron runs a script. as a user, it doesn’t run the user’s startup or login files (like .bashrc).
Therefore, any script. (being run from cron) needs to explicitly set any required variables. You
can directly set the variables within the script. or call another script. (such as Oracle’s oraenv
script) that exports these variables.
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