What are the different Linux® services?

Linux Services are applications that run on the background of the Linux operating system, usually without user intervention. Many Linux services are triggering services and are running when system shoes, before the user logs. Linux is a free open source program, so there are many diversity and specific services that are installed by default settings will vary depending on which Linux distribution is used. Services can be allowed, deactivated, managed and even modified by the user. An example is the "kudzu" that detects new or modified hardware. Other examples include "random" that generates a random number used for security and "ketable" that sets the keyboard mapping and system font. Many of them provide different network services, including the following: "httpd" provides Apache web server; "Inetd," Internet Superserver Daemon, start TCP/IP network services) will start transmission checks/Internet protocol (TCP/IP) and fromHe says for many other network services; "SMTP" sends and receives e -mail; And "NFS" allows hosting a network file server. These services may have different names depending on the Linux distribution; For example, Apache is called "httpd" on some distributions and "Apache2" on other distributions.

6 Examples include the "Cron" that is used to perform the planned tasks; "GPM" that supports the functionality of the mouse; “APMD” that provides advanced energy management; and "LPD", press spooler.

Services run on the basis of running level that defines the status of the system, such as login for one user, login multiple users, shutdown and restart. File /ETC /Inittab sets the default level and points to files, usually stored in /etc.d/; These RC.D scripts define what services start when entering runlelelevel. These scripts also define the priority of the start and priority of shutdown for eachService, from 0-100, to define the order in which the services start and turn off.

Some Linux distributions provide a graphical user interface (GUI) for service configuration. If this is not available at a certain distribution, some command line tools should still be available. The “Chkconfig” tool can be used to create or delete services, or to activate or deactivate services. The “NTSYSV” tool provides a simple selection interface that services should be automatically started. Any tools for configuring Linux services are simply the leading RC.D scripts and energy users can directly adjust these scripts to manage services.