Known as the "Swiss Army Knife" of networking, Netcat is a versatile tool for tasks like port scanning, file transfers, and creating network connections.
Use the following command to install Netcat on your Ubuntu system: sudo apt-get install netcat
With Netcat, you can set up a chat server by running: nc -l -p 1234 On another terminal, connect to it with: nc localhost 1234
File Transfer with Netcat To send a file, use this command on the sending machine: nc -l -p 1234 < file.txt On the receiving machine, use: nc sender_ip 1234 > file.txt
You can scan open ports on a remote server using: nc -z -v example.com 1-1000
Test HTTP server connections by typing: echo -e "GET / HTTP/1.1\r\n" | nc example.com 80 This command sends a basic HTTP GET request and displays the server's response.
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