Take the 2-minute tour ×  Whats the difference between using
chkconfig on and using chkconfig --add?  share|improve this
question  3 Answers 3  up vote 7 down vote accepted  chkconfig
--add adds a new service to the list of services managed by
chkconfig. I believe --add is an implicit on.  chkconfig on sets
the runlevel for the service.  That said, I tend to use
chkconfig -add for adding new services to a system, but ntsysv
to manage them (on RHEL-like systems).  share|improve this
answer I ran this chkconfig ntpd on without ever running --add
and that seemed to work fine. –  DD. Apr 30 '12 at 14:42
chkconfig --add is for adding new services; e.g. services or
daemons that are not already registered on the server. For
instance, if I download software that doesn't have an init
script and I write one... I would have to place that script in
/etc/init.d/ and run chkconfig --add to allow it to be managed
in the same manner. –  ewwhite Apr 30 '12 at 14:44  In
Redhat/CentOS, there is one line in the init script which