Since RHEL 7.0, Firewalld has been subject to controversies. Newcomers find it easy to work with because it masks complexity: ports used by protocols are stored in configuration files, network masquerading is started through the simple –add-masquerade option, permanent and temporary…

Troubleshooting a systemd service can be tricky. Because the Restart=always directive is sometimes set in the unit file, you don’t know if a service is running fine or if it is stopping and restarting all the time. The systemctl status…