crontab Linux

[root@songnan00 ~]# crontab -e 
crontab: installing new crontab 
[root@songnan00 ~]# crontab -l 
*/5 * * * * /usr/sbin/ntpdate ntpserver 2>&1 > /dev/null 
00 08 * * * /home/songnan/BVT_docker/bvt-script/bvt_install_master_asc.sh //每天8:00安裝build