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Old 04-07-2011, 08:16 AM   #1
Registered: Jan 2010
Posts: 125

Rep: Reputation: 15
Clock synchronization

Dear All,

Can anybody let me know command about how to uncheck option to synchronize clock with UTC. This option is being asked at installation time. I couldn't remember text correctly but above text will give you hint. Please let me know how can I uncheck that option using command.

Thanks in advance.
Old 04-07-2011, 08:42 AM   #2
Registered: Dec 2006
Location: South Dakota
Distribution: Red Hat, Ubuntu
Posts: 32

Rep: Reputation: 2
Smile stopping ntp

I did not see what flavor of Linux you are running so I will just give you info for Red Hat 5. Run service ntpd stop as root to shut it off. Use chkconfig for the same ntpd service to stop it from running at boot.
Old 04-07-2011, 09:06 AM   #3
Registered: Jan 2010
Posts: 125

Original Poster
Rep: Reputation: 15
I am using CentOS 5.5. My hwclock shos correct time and date whereas 'date' command is showing one hour behind the hwclock time. Please let me know command to update system date with hwclock.
Old 04-07-2011, 01:27 PM   #4
Registered: Jun 2005
Posts: 202

Rep: Reputation: 35
date set

setup timezone first

rm /etc/localtime

ln -s /usr/share/zoneinfo/GMT /etc/localtime


# cd /etc
# ln -sf /usr/share/zoneinfo/Asia/Calcutta localtime

# sudo ln -s /usr/share/zoneinfo/America/New_York /etc/localtime

check date
If not correct get correct time on the web with

check again with date. This should work if not then it's not good.

I don't recoment this and I don't know why I copied this. But your
last resort if not correct is to set it manually with

$ sudo date MMDDhhmmYYYY


$ sudo date 122317212011

MM - Two digit month number
DD - Two digit date
hh - Two digit 24 hour system hour
mm - Two digit minute
YYYY - Four digit year code

Also you should check out DST or summer time.

I don't mess with hwclock. You can make too many mistakes.
Old 04-08-2011, 04:33 AM   #5
Registered: Jan 2010
Posts: 125

Original Poster
Rep: Reputation: 15
Deaar whk,

Thanks dear for suggestions. I used command hwclock --hctosys --local and now my 'date' command and 'hwclock' command showing same date,time and timezone.


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