USER SSH ADD TO EC2 and config crontab

add user ssh to ec2 instance

$ ssh-keygen -t rsa

$ cat /you/.ssh/id_rsa.pub | ssh -i pem_file.pem [email protected] "cat >> .ssh/authorized_keys"
}



# CRONTAB

# ┌───────────── minute (0 - 59)
# │ ┌───────────── hour (0 - 23)
# │ │ ┌───────────── day of month (1 - 31)
# │ │ │ ┌───────────── month (1 - 12)
# │ │ │ │ ┌───────────── day of week (0 - 6) (Sunday to Saturday;
# │ │ │ │ │                                       7 is also Sunday on some systems)
# │ │ │ │ │
# │ │ │ │ │
# * * * * *  command_to_execute



###### Sample crontab ######

# Empty temp folder every Friday at 5pm
0 5 * * 5 rm -rf /tmp/*

# Backup images to Google Drive every night at midnight
0 0 * * * rsync -a ~/Pictures/ ~/Google\ Drive/Pictures/


Check that cron is running
If cron isn't running then your commands won't be scheduled ...

ps -ef | grep cron | grep -v grep
should get you something like

root    1224   1  0 Nov16 ?    00:00:03 cron
or

root    2018   1  0 Nov14 ?    00:00:06 crond
If not restart it

/sbin/service cron start
or

/sbin/service crond start

sudo /etc/init.d/cron start