Online tools

Cron to systemd

When both day and weekday are set, cron ORs them. This OnCalendar ANDs them.

How to use it

1. Enter five cron fields
2. Read the OnCalendar
3. Put it in a timer

Other tools

• umask calculator
• Subnet overlap
• MAC address
• Email and URL check
• Open Graph tags
• robots.txt generator