System Administration

Chmod calculator

Convert Linux file permissions between different formats.

Generate crontab syntax for your cron jobs.

Check DNS records against a selected list of DNS servers located in multiple regions worldwide.

Test the performance of the DNS servers of a domain name from all over the world.

Check the functioning of the rewriting rules of your htaccess file.

Learn DNS by setting up DNS records.

Free website tracking service to check if they are online or down.