Thread by @devops_tech

Top 20 Linux networking commands explained with examples!

A Thread 👇

1⃣ ifconfig: Displays network interface configuration.

For example,
ifconfig eth0

shows the configuration details of the Ethernet interface. #LinuxNetworkingExample

2⃣ ip: Versatile command to manage network interfaces, addresses, and routes.

For instance,
ip addr show

displays IP addresses assigned to all interfaces. #LinuxNetworkingExample

3⃣ ping: Checks connectivity to a host by sending ICMP echo requests.

E.g.,
ping google.com

verifies if you can reach Google's servers. #LinuxNetworkingExample

4⃣ traceroute: Determines the path packets take to reach a destination.

Example:
traceroute google.com

shows the network hops to Google. #LinuxNetworkingExample

5⃣ netstat: Shows network connections, open ports, and routing table.

netstat -tuln

displays listening TCP/UDP ports. #LinuxNetworkingExample

6⃣ ss: Similar to netstat, provides socket-level details.

For eg.
ss -tunap

to view all TCP and UDP sockets with associated processes. #LinuxNetworkingExample

7⃣ route: Manages IP routing table.

Example:
route -n

shows the routing table with network destinations and gateways. #LinuxNetworkingExample

8⃣ iptables: Powerful firewall tool.

E.g.,
iptables -A INPUT -p tcp --dport 22 -j ACCEPT

allows SSH traffic. #LinuxNetworkingExample

9⃣ tcpdump: Captures and analyzes network traffic.

tcpdump -i eth0 port 80

captures HTTP traffic on the Ethernet interface. #LinuxNetworkingExample

🔟 nslookup: Queries DNS servers.

nslookup google.com

retrieves the IP address of Google's domain. #LinuxNetworkingExample

1⃣1⃣ dig: Advanced DNS lookup utility.

dig +trace example.com

performs a trace route for Example's domain. #LinuxNetworkingExample

1⃣2⃣ hostname: Displays or sets the system's hostname.

hostname

shows the current hostname. #LinuxNetworkingExample

1⃣3⃣ arp: Manages ARP cache.

arp -a

displays the ARP table with MAC and IP address mappings. #LinuxNetworkingExample

1⃣4⃣ ifup/ifdown: Activates or deactivates a network interface.

E.g.,
ifdown eth0

disables the Ethernet interface. #LinuxNetworkingExample

1⃣5⃣ iwconfig: Configures wireless network interfaces.

Example:
iwconfig wlan0 essid "MyNetwork"

sets the wireless network. #LinuxNetworkingExample

1⃣6⃣ netcat (nc): Versatile networking utility.

nc -vz google.com 80

checks if port 80 on Google is reachable. #LinuxNetworkingExample

1⃣7⃣ ssh: Connects to a remote machine securely.

ssh user@hostname

establishes an SSH session to the specified host. #LinuxNetworkingExample

1⃣8⃣ scp: Copies files securely between hosts.

scp file.txt user@hostname:/destination

transfers file.txt to a remote host. #LinuxNetworkingExample

1⃣9⃣ wget: Retrieves files from the web.

E.g.,
wget example.com/file.zip

downloads file.zip from a URL. #LinuxNetworkingExample

2⃣0⃣ curl: Versatile tool for transferring data.

curl api.example.com

fetches data from the specified URL. #LinuxNetworkingExample

Hope these examples help you understand these networking commands better! #Linux #Networking #SysAdmin

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