Netcat (simple file transfer,Remote Administration)

For file transfer:

At sender:
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nc -lvp 4444 < file1.txt

4444 ---> random port number

At receiver:
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nc <machine1_ip> 4444 > file1_renamed.txt

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Remote Administration:

At remote machine:
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nc -lvp 4444 -e cmd.exe

At the machine where we want to connect the remote machine:
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nc <machine1_ip> 4444

It will provide access to the command prompt opened on the remote machine.