LXer: Useful netcat examples on Linux

LXer · 01-27-2014, 02:10 PM

Published at LXer:

Often referred to as the "swiss army of knife" for TCP/IP networking, Netcat is an extremely versatile Linux utility that allows you to do anything under the sun using TCP/UDP sockets. It is one of the most favorite tools for system admins when they need to do networking related troubleshooting and experimentation. This tutorial presents a few useful netcat examples, although the sky is the limit when it comes to possible netcat use cases.

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metaschima · 01-27-2014, 02:37 PM

I believe the sending a file example may be wrong. From all other sites I see that the '-l' listen command is used for the server sending the file.
http://peppoj.net/2012/09/how-to-sen...rmerly-netcat/
http://www.binarytides.com/netcat-tu...for-beginners/

schneidz · 01-27-2014, 03:07 PM

i copied this from someone elses signature:

Code:

[schneidz@hyper ~]$ cat ./stuff/netcat.com
#!/bin/bash
PL=$(find /root/user/music -name "*.mp3")
NUM=$(echo $PL |wc -w)
{
while true; do
r=$(($RANDOM%$NUM))
s=$(echo $PL |cut -d ' ' -f$r)
echo "HTTP/1.0 200 OK\nContent-Type: audio/x-mp3stream\n\n"
dd if=$s bs=1024
done
} | nc -l -s address -p 8020