I‘d like to tell my BSD PF firewall to flush out the current configuration every 2 minutes. This will help when I’m testing a new rules and configuration options. Some time I find myself locked out of my own remote server. How do I reset PF firewall automatically without issuing hard reboot?
How do I check the existing Linux / UNIX users and groups under Linux / UNIX operating system?
Q. I run quite large network with different subnets. I’d like to know how can I find out duplicate IP address under Linux / UNIX? A. You can use arpping command. The arping utility performs an action similar to ping command, but at the Ethernet layer. You can send ARP REQUEST to a neighbor host [...]