08-21-2008
about NTP reconfiguration..
Most services can re-load/re-read their configuration file through the command "service xxxx reload", which is usually implemented by "kill -HUP service_pid" .
for NTPD service, "service ntpd restart" and "service ntpd reload" are identical in /etc/rc.d/init.d/ntpd. what's more, "kill -HUP ntpd_pid" command will cause ntpd service to restart.
Hence, if we want ntpd to re-read its configuration file after run-time configuration, do we have to restart ntpd? Is there any way to reconfigure ntpd without restarting it ?
Thanks!!
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svc(8) System Manager's Manual svc(8)
NAME
svc - controls services monitored by supervise(8).
SYNOPSIS
svc [ -udopchaitkx ] services
DESCRIPTION
services consists of any number of arguments, each argument naming a directory used by supervise(8).
svc applies all the options to each service in turn.
OPTIONS
-u Up. If the service is not running, start it. If the service stops, restart it.
-d Down. If the service is running, send it a TERM signal and then a CONT signal. After it stops, do not restart it.
-o Once. If the service is not running, start it. Do not restart it if it stops.
-p Pause. Send the service a STOP signal.
-c Continue. Send the service a CONT signal.
-h Hangup. Send the service a HUP signal.
-a Alarm. Send the service an ALRM signal.
-i Interrupt. Send the service an INT signal.
-t Terminate. Send the service a TERM signal.
-k Kill. Send the service a KILL signal.
-x Exit. supervise(8) will exit as soon as the service is down. If you use this option on a stable system, you're doing something
wrong; supervise(8) is designed to run forever.
SEE ALSO
supervise(8), svok(8), svstat(8), svscanboot(8), svscan(8), readproctitle(8), fghack(8), pgrphack(8), multilog(8), tai64n(8), tai64nlo-
cal(8), setuidgid(8), envuidgid(8), envdir(8), softlimit(8), setlock(8)
http://cr.yp.to/daemontools.html
svc(8)