network-info

收集网络配置与连通性信息，包括接口、路由和 DNS。

SKILL.md

--- frontmatter

name: network-info
description: Gather network configuration and connectivity information including interfaces, routes, and DNS

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:

bash

./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