commans

//get the list of all the crone jobs
- crontab -l

//edit a cronn job
- crontab -e

// format
* * * *  *
m h d mo wk

m : minute (0-60)
h : hour (0 - 23)
d : day (1-31)
mo: month(1-12)
wk: weekday(0-6) 0:sunday to 6:saturday