≡ Menu

security purpose

Linux: Find Out Open Files [ Descriptors ] Command

How do I find out that how many files are open and how many allowed in Linux server operating systems?
[click to continue…]

Postfix Hide Client (MUA) System IP Address / Hostname

I've central mail server gateway. All of our internal systems through this box. How do I remove or hide the hostnames and IP addresses of our internal systems from the messages headers before they go out to other users for security purpose?
[click to continue…]