请教两个cron的问题

suran

1，默认crontab中没有定义cron.daily,weekly...文件夹，里面的计划任务会执行吗?

2，这一段的作用是.....？
# check scripts in cron.hourly, cron.daily, cron.weekly and cron.monthly
59  *  * * *        root        rm -f /var/spool/cron/lastrun/cron.hourly
9  3  * * *        root        rm -f /var/spool/cron/lastrun/cron.daily
19 4  * * 6        root        rm -f /var/spool/cron/lastrun/cron.weekly
29 5  1 * *        root        rm -f /var/spool/cron/lastrun/cron.monthly
*/10  *  * * *        root        test -x /usr/sbin/run-crons && /usr/sbin/run-crons

wecoh

1。会
2。http://www.gentoo.org/doc/en/cron-guide.xml

4.  Using cronbase
    *  They will run even if your computer was off when they were scheduled to run
    * It is easy for package maintainers to place scripts in those well defined places
    * You know exactly where your cron-jobs and your crontab are stored, making it easy for you to backup and restore this part of your system

suran

Post by wecoh;2029266
1。会
2。http://www.gentoo.org/doc/en/cron-guide.xml

谢谢
第一个问题还有一点不明白，既然不用定义cron.monthly/ cron.weekly/  
cron.daily/   cron.hourly/
那么它们是在什么时间执行的？
--------------------------------------------------------------
srx shom # cat /etc/cron.daily/makewhatis
#!/bin/sh
# this is part of the man package
# it updates the search database for manpages

exec nice makewhatis -u