inetd와 xinetd의 차이

The inetd daemon is a master daemon that listens on a number of different network ports. When a connection comes in, it wakes up the relevant daemon (e.g. telnetd, ftpd, fingerd, rshd). This reduces system overhead where daemons are only called occasionally : for the 99% of the time that no new connections are coming in, only one daemon is using up CPU cycles rather than lots. (If you have a daemon which is being used a lot, such as ftpd in a dedicated ftp server, you would run it all the time and not use inetd).

As far as I know, xinetd and inetd and just different implementations of this same functionality. Xinet is more complex (rather than one single config. file, lots of different ones) but allows more granularity of control (and tools like chkconfig make management simple).

구글에서 inetd vs xinetd 으로 검색해보세요... 더많은 답을 얻으실수 있을겁니다.