network-info

Network Information Skill Use this skill to explore network configuration and connectivity on Linux systems. Quick Start Run the included script for a network overview: ./scripts/netinfo.sh Manual Commands Network Interfaces ip addr or ip a - Show all network interfaces and IP addresses ip link - Show interface status (up/down) cat /sys/class/net/*/address - MAC addresses Routing ip route - Show routing table ip route get 8.8.8.8 - Show route to a specific destination DNS Configuration cat /etc/resolv.conf - DNS servers cat /etc/hosts - Local host mappings systemd-resolve --status - DNS status (systemd systems) Active Connections ss -tuln - Show listening TCP/UDP ports ss -tupn - Show established connections with process info cat /proc/net/tcp - Raw TCP connection data Network Statistics ip -s link - Interface statistics (bytes, packets, errors) cat /proc/net/dev - Network device statistics Tips Use ip commands (modern) over ifconfig / netstat (deprecated) The -n flag prevents DNS lookups for faster output Check ss -tuln to see what services are listening