xinetd与chkconfig

一同事在写系统管理相关方面的图书章节，遇到这样一个让人迷惘的现象，下面是我们实际的操作：
[root@wcs ~]# chkconfig --list |grep telnet
[root@wcs ~]# chkconfig telnet on
[root@wcs ~]# chkconfig --list |grep telnet
[root@wcs ~]# chkconfig xinetd on
[root@wcs ~]# chkconfig --list |grep telnet
        telnet: 启用
        krb5-telnet:    关闭
[root@wcs ~]# chkconfig xinetd off
[root@wcs ~]# chkconfig --list |grep telnet
[root@wcs ~]# chkconfig telnet on
[root@wcs ~]# chkconfig --list |grep telnet
[root@wcs ~]# telnet localhost
Trying 127.0.0.1...
Connected to localhost.localdomain (127.0.0.1).
Escape character is '^]'.
Red Flag DC Server release 5.0 (Trinity)
Kernel 2.6.9-34.21AXhugemem on an i686

login: root
Password:
[root@wcs ~]# cat /etc/xinetd.d/telnet
# default: on
# description: The telnet server serves telnet sessions; it uses \
#       unencrypted username/password pairs for authentication.
service telnet
{
        disable = no
        flags           = REUSE
        socket_type     = stream
        wait            = no
        user            = root
        server          = /usr/sbin/in.telnetd
        log_on_failure  += USERID
}
[root@wcs ~]# chkconfig telnet off
[root@wcs ~]# cat /etc/xinetd.d/telnet
# default: on
# description: The telnet server serves telnet sessions; it uses \
#       unencrypted username/password pairs for authentication.
service telnet
{
        disable = yes
        flags           = REUSE
        socket_type     = stream
        wait            = no
        user            = root
        server          = /usr/sbin/in.telnetd
        log_on_failure  += USERID
}
能看出些什么东西吗？

也就是说chkconfig 可以控制一切！但是控制xinetd下的服务，是隐式的；和/etc/init.d/*的服务有些不同。如果不启动xinetd，chkconfig --list是看不到的。

同事说：这就是Linux，总是能给你带来惊喜！你总能在她的下面发现一些意外！