crontab / crond

1. OS version

[root@instance-1 ~]# cat /etc/*release*

CentOS Linux release 7.9.2009

 

1. crond 프로세스 확인

[root@instance-1 ~]# service crond status

Redirecting to /bin/systemctl status crond.service●

crond.service - Command Scheduler Loaded: loaded (/usr/lib/systemd/system/crond.service; enabled; vendor preset: enabled) Active: active (running)

...

[root@instance-1 ~]#

 

 

2. crond 시작/정지/재시작 

[root@instance-1 ~]# service crond stop

Redirecting to /bin/systemctl stop crond.service

[root@instance-1 ~]#

[root@instance-1 ~]#

[root@instance-1 ~]# service crond start

Redirecting to /bin/systemctl start crond.service

[root@instance-1 ~]#

[root@instance-1 ~]# service crond restart

Redirecting to /bin/systemctl restart crond.service

[root@instance-1 ~]#

[root@instance-1 ~]#

 

 

3. crontab 사용

 

 작업리스트 조회

[root@WWW ]# crontab -l

 

 작업리스트 수정

[root@WWW ]# crontab -e

 

 작업리스트 삭제

[root@WWW ]# crontab -r

 

4. crontab  세부내용

[root@instance-1 ~]# crontab -l

#attendDaily

1 6 * * *    TZ=Asia/Seoul   /opt/CRONJOB/attendDaily/BATCH1.sh

0 6 * * *   TZ=KST               /opt/CRONJOB/attendDaily/BATCH2.sh

[root@instance-1 ~]#