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IBM developerWorks : Linux : Education - Tutorials
LPI certification 102 exam prep, Part 3
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3. Internet services
  


Introducing inetd page 1 of 12


A single Linux system can provide dozens, even hundreds, of network services. For example, when you use the telnet program, you are accessing the telnet service on a remote system. Likewise, when you use the ftp program, you are connecting to the ftp service on the remote system.

In order to provide these services, the remote system either runs an instance of each server to accept connections (for example /usr/sbin/in.telnetd and /usr/sbin/in.ftpd), or runs inetd. The inetd program accepts each incoming connection and starts the appropriate services to handle the connection based on its type. For this reason, inetd is also known as the "Internet superserver."

On a typical Linux installation, inetd handles most incoming connections. Only a few programs (such as sshd and lpd) handle their own network communication without relying on inetd to accept incoming connections.


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