Talk about the difference between using crontab e and directly editing and etc and crontab when Linux is configured for timing

Linux configuration timing task, we all know to use crontab this system function, but sometimes we need to distinguish between user execution, let's directly say the difference between 1 and 2 methods:

Method 1:

Use the command crontab-e and edit the timing script directly.

After this execution, the user-defined file will be written to /var/spool/cron, and a file with the username 1 will be generated. The file content is the timing script we edited.

Such as:

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

Method 2:

Edit the timing script using the command vi /etc/crontab.

Such as:

[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 ~]# 

System level configuration we will configure /etc/crontab directly

It is still recommended to use crontab-e (user level) 1, so that the system will also help to check the syntax of our configured scripts.