security is an important aspect of system administration that involves protecting the system from unauthorized access, malicious attacks

One of the most fundamental components of Linux security is the firewall.

Firewall controls incoming and outgoing network traffic based on a set of predefined rules.

These firewalls can be configured to allow or block specific types of traffic based on port number, protocol, or IP address.

Linux systems come with a built-in firewall called iptables or nftables

Keeping your system up to date is critical to maintaining its security.

Monitoring system logs can help you identify and respond to security threats

Some popular tools include nmap for network scanning, Wireshark for packet sniffing help you identify security vulnerabilities.