EDITOR=vi; export EDITOR
# (put your own initials here)echo the date to the console every# 15minutes between 6pm and 6am0,15,30,45 18-06 * * * /bin/echo ‘date‘ > /dev/console
$ crontab davecron
$ crontab -l0,15,30,45 18-06 * * * /bin/echo `date` > dev/tty1
$ crontab -l > $HOME/mycron
$ crontab -e
# DT:delete core files,at 3.30am on 1,7,14,21,26,26 days of each month30 3 1,7,14,21,26 * * /bin/find -name ‘core‘ -exec rm {} \;注解
最好在crontab文件的每一个条目之上加入一条注释，这样就可以知道它的功能、运行时间，更为重要的是，知道这是哪位用户的定时作业。
$crontab -r
* * * * * myCommand
3,15 * * * * myCommand
3,15 8-11 * * * myCommand
3,15 8-11 */2 ?* ?* myCommand
3,15 8-11 * * 1 myCommand
30 21 * * * /etc/init.d/smb restart
45 4 1,10,22 * * /etc/init.d/smb restart
10 1 * * 6,0 /etc/init.d/smb restart
0,30 18-23 * * * /etc/init.d/smb restart
0 23 * * 6 /etc/init.d/smb restart
* */1 * * * /etc/init.d/smb restart
0 23-7 * * * /etc/init.d/smb restart
脚本中涉及文件路径时写全局路径；
cat start_cbp.sh!/bin/shsource /etc/profileexport RUN_CONF=/home/d139/conf/platform/cbp/cbp_jboss.conf/usr/local/jboss-4.0.5/bin/run.sh -c mev &
0 * * * * . /etc/profile;/bin/sh /var/www/java/audit_no_count/bin/restart_audit.sh
0 */3 * * * /usr/local/apache2/apachectl restart >/dev/null 2>&1
$service cron restart
$sudo /etc/init.d/cron start$sudo /etc/init.d/cron stop$sudo /etc/init.d/cron restart
crontab定时任务_net
原文地址：https://www.cnblogs.com/jxhd1/p/9521160.html