浅谈Linux配置定时,使用crontab -e与直接编辑/etc/crontab的区别

[root@localhost cron.d]# cd /var/spool/cron
[root@localhost cron]# ll
总用量 4
-rw-------. 1 root root 52 12月 9 10:58 root
[root@localhost cron]# pwd
/var/spool/cron
[root@localhost cron]# cat root 
30 03 * * * /root/automysqlbackup.sh

[root@localhost ~]# cat /etc/crontab                                                                                   
SHELL=/bin/bash                                                                                              
PATH=/sbin:/bin:/usr/sbin:/usr/bin                                                                                    
MAILTO=root                                                                                                
HOME=/                                                                                                  
                                                                                                     
# run-parts                                                                                                
30 * * * * root /usr/sbin/ntpdate 210.72.145.44                                                                              
#30 8 * * * root /usr/sbin/ntpdate 132.228.90.101                                                                             
01 * * * * root run-parts /etc/cron.hourly                                                                                
02 4 * * * root run-parts /etc/cron.daily                                                                                 
22 4 * * 0 root run-parts /etc/cron.weekly                                                                                
42 4 1 * * root run-parts /etc/cron.monthly                                                                                
*/1 * * * * root run-parts /opt/openoffice.org3/program/start.sh                                                                     
############################################                                                                               
30 4 * * * root /usr/bin/rsync -vzrtopg --progress --delete root@192.168.231.35::resource /hyy/bak/resource 
30 4 * * * root /usr/bin/rsync -vzrtopg --progress --delete root@192.168.231.35::log /hyy/bak/log
############################################
[root@localhost ~]#