Networking tools in the command-line interface (CLI) are essential for diagnosing and troubleshooting network-related issues. They provide various utilities to help you analyze, configure, and manage network connections and services.
Here are some commonly used networking tools in the CLI:
- ping: Tests network connectivity to a remote host by sending ICMP echo requests and receiving replies.
ping example.com- tracert (Windows) or traceroute (Linux/Unix): Traces the route taken by packets to reach a network host, showing the sequence of routers and delays.
tracert example.com- nslookup (Windows) or dig (Linux/Unix): Queries DNS servers to obtain information about domain names, IP addresses, and DNS records.
nslookup example.com- netstat: Displays active network connections, routing tables, and network statistics.
netstat -ano- ipconfig (Windows) or ifconfig (Linux/Unix): Displays or configures network interfaces and their settings.
ipconfig /all- arp (Windows) or arp (Linux/Unix): Manipulates and displays the ARP (Address Resolution Protocol) cache, which maps IP addresses to MAC addresses on a local network.
arp -a- route (Windows) or route (Linux/Unix): Manipulates and displays the routing table, which determines how network packets are forwarded.
route print- telnet: Connects to remote computers using the Telnet protocol, allowing you to interact with network services.
telnet example.com 80- ssh: Securely connects to remote servers using the SSH (Secure Shell) protocol for secure remote administration.
ssh user@example.com- netsh (Windows): Configures various network settings, including firewall rules, interface settings, and more.
netsh interface ipv4 show config - ifconfig (Cisco devices): Displays information about Cisco network interfaces and configurations.
show interfaces - Wireshark (not a command-line tool): A GUI-based network protocol analyzer for capturing and inspecting network packets.
- nc (netcat): A versatile networking utility that can be used for tasks like port scanning, banner grabbing, and creating network connections.
nc -vz example.com 80 - curl or wget: Command-line tools for downloading files from the internet, often used to test web server connectivity.
curl -I https://example.com - ip (Linux/Unix): A versatile tool for configuring and managing network interfaces, routes, and more.
ip addr show - ss (Linux/Unix): A tool to provide information about sockets, network connections, and network statistics.
ss -tuln - nmap: A powerful network scanner used for network discovery and security auditing.
bash nmap -p 1-1000 example.com
These networking tools are invaluable for network administrators, system administrators, and developers to diagnose and resolve network issues, configure network interfaces, and perform various network-related tasks. Use them with caution and follow appropriate security and usage guidelines when troubleshooting or managing networks.