There’s a basic usage for netcat helping you to transfer data/files across hosts without ssh or ftp services
Here’s what I usually do on server (example IP: 1.2.3.4)
nc -l -p 6666 | uncompress -c | tar xvfp –
Basically I open TCP port 6666 (or whatever you want) on server and listen for raw compressed data
 
On my client I need to issue a command like this
tar cpf – /my/cool/dir | compress -c | nc -w 3 1.2.3.4 6666
Where /my/cool/dir is what I want to transfer, 1.2.3.4 is the destination host (server) and 6666 is the previously opened TCP port; you can even set a timeout (in seconds) for connection, suggested if you’re in a busy network
 
Data on this stream are compressed so faster downloads are possible, this kind of trick is useful when you need to transfer data on the fly or when you don’t have ssh shell host, scp or ftp server; I use it heavily expecially on embedded devices or dumb machines
 
Hope it helps
 
Andrea Ben Benini
