chkconfig,ntsysv,service confusing commands

[vickey_20]

NTSYSV
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I assume all the services ( which are installed of course ) offered by Linux can be viewed through

ntsysv

Putting a "*" here ensures that next time the system reboots the selected service will be started( If I m not wrong then these services are also called as init scripts) .
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CHKCONFIG
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chkconfig command pretty much does the same thing

chkconfig service on/off

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SERIVCE
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Now the required service ( i.e the one shown in ntsysv ) can be started/stopped using the service command.

service servicename start/stop

Now what is confusing me is that there is a init script /service telnet that I see using ntsysv

when I give this command it tells me

service telnet start

telnet service not recognized

[Roxoff]

telnet runs through the xinetd service - it's one of several services that are marshalled in this way. If you want to turn it on or off, edit the config file for telnet which is usually in /etc/xinetd.d, but may be elsewhere depending on your distro, and restart the xinetd service.

If you're planning to use the telnet server, you may want to consider using SSH instead, which provides a similar shell service with none of the security implications.