Briefly introduce the types of Linux network services
If someone asks you what is the most powerful feature of Linux, you will probably answer "it's the network function". One of the advantages of Lmux operating system is the network function, which includes a relatively stable allocation of system resources, as well as a more secure network protection capability, so many people like to use it to build network servers.
As a network operating system, the most important function of Linux is to provide a variety of network services, and each network service is a door into the system with a variety of security levels. To make it easier for users to set up Linux server systems, most Linux distributions install as many services as possible by default.
Some of these services are services that users do not want to need or understand. Or they have to change their default configuration and install uncompensated versions to ensure their security, so once they are invaded by the network, they will encounter unimaginable disasters, so it is particularly important to understand and use the network correctly. Of course, the role of Linux goes far beyond the setting up of web servers.
Types of Linux network services
Linux services generally include Standalone (independent) services and xinetci (super) services. The so-called services, such as http (Web web service), FTP file transfer service, ssh (remote login service), etc., are independent (Standalone) services.
Services such as Telnet (synchronizing files) are xinetd services. In fact, understanding how each service works is very useful for server debugging in the future, and it will also be helpful to some extent in host planning.
Samba, a well-known file service on Linux, works mainly as follows: NetBIOS overTCP/] P, and if you understand the most primitive, that is, you cannot cross network segments with BIOS, that is, you cannot cross routers, then it is easier to understand why the number of computers displayed by "network neighbors" on the Windows network is only those in the local area network. In addition, only you are familiar with the operation mode of FTP. It is possible to understand that "passive" and "active" online are in fact closely related to the setting of FTP hosts.
We understand the types of these services, which will help to set up and maintain the server.
