This is part of the #LinuxUpSkillChallenge. Don't forget to also check out the Official Instructions and the Reddit posts.
crontab -l
vim /etc/crontab
m
- minute (0-59)
h
- hour (0-23)
dom
- day of the month (1-31)
mon
- month of the year (1-12)
dow
- day of the week (sun-sat)
systemctl list-timers
journalctl
For more detail on how I did each day, check out my log on Reddit. Follow me on Twitter for daily updates.