David Hláčik wrote:
Hello,
in system-config-date i have checkbox synchronize date before service startup. Which config switch,file does it affect? I want to turn it on on my CentOS machine without xauth , just editing config files , i was hoping it could be in /etc/sysconfig/ntpd but no.


most likely, the system-config util is setting that option in /etc/sysconfig/ntpd which by default reads...

# Drop root to id 'ntp:ntp' by default.
OPTIONS="-u ntp:ntp -p /var/run/ntpd.pid"

# Set to 'yes' to sync hw clock after successful ntpdate
SYNC_HWCLOCK=no

# Additional options for ntpdate
NTPDATE_OPTIONS=""

if -x is /not/ set in OPTIONS, it calls /usr/sbin/ntpdate with various parameters, this hard sets the system time to the NTP server time. if -x /is/ set, it does the time step thing

if SYNC_HWCLOCK=yes, then it invokes sync_hwclock in the /etc/init.d/ntpd script, which in turn runs /sbin/hwclock with various options as specified.


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