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CLI Magic: netcat

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The response to my recent sysadmin toolbox article has been overwhelming. By far, readers' number one suggestion was to replace Telnet with netcat. Here then is an introduction to netcat for Linux users who may not be familiar with the "TCP/IP Swiss Army knife."

In the simplest terms, netcat is a utility that reads and writes data across the network. As you probably know already, you can write to a file or read from a file on your local machine using the cat utility. By running cat filename > filename2 , you can write the contents of a file to another file. By using cat > filename , you can write directly to a file from standard input.

The netcat utility works on the same principle as the cat utility, but over the network.

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