Man man notes and @ reboot usage of crontab

This afternoon, , See can be in crontab Use @reboot To achieve the effect of starting the self starting program ：
stay crontab edit

ask ： Why? man crontab I didn't see this @reboot Parametric ？

#double The guidance of the article ：
man --pager=cat 5 crontab | vim -R -
ls /usr/share/man/man*/* | egrep cron
# manual entry for crontab in section 5
#  perhaps man 5 crontab , You can see  @reboot Of explains .
man 5 crontab 

 And here it comes to man The knowledge of , Knock instruction ：
man man

= Split line ==
For example, you want to see and ssh Related documents

Reference resources ：https://blog.csdn.net/qiuxin315/article/details/6799629