There are 3 basic modes of crontab
- crontab -l : lists all the scheduled commands/scripts for current user
- crontab -l -u username : lists all the scheduled commands/scripts for specific user
- crontab -e : edit the scheduled commands/scripts
Here is how it lists all cronjobs under current user
dbadm@linux122:~> crontab -l # DO NOT EDIT THIS FILE - edit the master and reinstall. # (/tmp/crontab.XXXX7mwgtU installed on Tue Nov 12 17:53:36 2013) # (Cron version V5.0 -- $Id: crontab.c,v 1.12 2004/01/23 18:56:42 vixie Exp $) #### BACKUPS 01 01 * * * /home/DB_BKPS/scripts/sample1_backup.sh 01 02 * * * /home/DB_BKPS/scripts/sample2_backup.sh
Say if you are in root user and want to list cronjobs for user dbadm
linux122:~ # crontab -l -u dbadm # DO NOT EDIT THIS FILE - edit the master and reinstall. # (/tmp/crontab.XXXX7mwgtU installed on Tue Nov 12 17:53:36 2013) # (Cron version V5.0 -- $Id: crontab.c,v 1.12 2004/01/23 18:56:42 vixie Exp $) #### BACKUPS 01 01 * * * /home/DB_BKPS/scripts/awdrt_backup.sh 01 02 * * * /home/DB_BKPS/scripts/gsrtc_backup.sh
You can edit the crontab to add/edit/delete the cronjobs with the command crontab -e
Give the path of the script as below
01 */1 * * * /path-of-script/script.sh 2>&1 | mail -s " Subject of the mail (Include `date` in subject for more accuracy)" your@emailadress
It has been scheduled for 1st min of every hour
So every time the script is executed as scheduled the output is sent to the mail address specified above
Have a Nice Day
References :
Refer these series of posts to learn the basics of shell commands
Basic Shell command to make ourselves comfortable at all times
Basic Shell command to make ourselves comfortable at all times - Part 2
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