请教达人解说 Daemon~~ :)

ivanfan

一直不是太清楚~~
想系统的了解下
给段教程也好  谢谢大家拉  

d00m3d

daemon = a service running in the background

ivanfan

IMB教材上只说： daemon refers to a never-ending process,usually a system process that controls a system resource such as the printer queue or performs a network service~~
但我还是不能只凭这句话理解呀  T_T

d00m3d

It is self-explanatory!  I am worried about your CET-6 exam!....(just kidding)

A daemon is a system process (service) running in the background.  Usually, it is non-stop, i.e. never-ending.  A daemon can be running simultaneously with other daemons.    Daemon usually ends with a d as suffix, e.g. sshd, telnetd, vsftpd, httpd, mysqld, lpd etc.  Have a look with the command:

ps aux

You can see there are many servicing processes (and daemons) running in your system.

These daemons accept client requests and provide the relevant services, e.g.
sshd, telnetd provide you the remote login services
vsftpd, the very secure ftp server access
httpd, your web server service
lpd, your printer services

Clear?

ivanfan

T_T  六级还没准备呢  ,又搜了些资料,看看老兄的解说,大致有了了解,
谢谢你拉!!  多谢

弥敦路九号

daemon 类似于 windows 中的 services 概念, 主要是提供服务,所以与用户没有关系,它在用户登录前启动.