???????·???? /etc/crontab
????????????

 

SHELL=/bin/bash
PATH=/sbin:/bin:/usr/sbin:/usr/bin
MAILTO=root
HOME=/
# For details see man 4 crontabs
# Example of job definition:
# .---------------- minute (0 - 59)
# |  .------------- hour (0 - 23)
# |  |  .---------- day of month (1 - 31)
# |  |  |  .------- month (1 - 12) OR jan??feb??mar??apr ...
# |  |  |  |  .---- day of week (0 - 6) (Sunday=0 or 7) OR sun??mon??tue??wed??thu??fri??sat
# |  |  |  |  |
# *  *  *  *  *  command to be executed
29  *  *  *  * root run-parts /testcron >> /testcront

???????????????????ù?????????????е??????????С????
????[html] view plaincopy
????mm  hh dd mm we user run-parts /dir
??????????????????н????????????????е??????????????????????????????????ò????С???????????????
????????????mm????????????????hh???С???????????? ?? ???? ??? run-parts ???? ????????????????????????? /n ?????n?????λ?????Ρ?
????eg.1
????/20 3 * * * root run-parts /testcron>>testcront     ;????3????20??????????/testcron???μ????п???н??????3:00??3:20??3:40?????С?
????????????????·
????1.????????????? ????????????????н????
????2.???crontab??????????????????????????ж??????????
????3.????crond????
????service crond restart
????4.??????????????п?????????????У????????????????
????ls -l filename
????chmod 777 filename
????5.??????????????????????????????????????????????????shell?????????Щ?????????????java??gcc???????????????????????????·??????????