12-03-2012
fpmurphy is rigth, I'm not sure about all the NTP versions, but, in my experience, any time difference more than 5 minutes will produce a ntpd synchronization fail, it will back to the LOCAL time, so, if you have more than this difference, you must to do a ntpdate before to start the ntpd daemon.
This User Gave Thanks to hombreopaco For This Post:
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
I would like to setup date / time sync on Solaris 8 using the command ntpdate. How do I set it up?
Thanks
Mark (1 Reply)
Discussion started by: miredale
1 Replies
2. Solaris
Hi experts,
I've a master server which sync to ntp time server daily by using xntpd daemon. Then my client servers will use ntpdate through cron job to synchronize the time hourly. (By using ntpupdate -s -B 'master server')
My question is, now I'll need to synchronize to a oracle server which... (2 Replies)
Discussion started by: kenzoo
2 Replies
3. SCO
Hi Guys,
A weird problem. I have disabled ntpd daemon on a HP server and placed
ntpdate in crontab instead and redirected the log to a file. This command
in cron synchronizes the server with a local time server every 15 minutes.
The weird part is that on 3 specific times (5:00 am, 10:00 am,... (2 Replies)
Discussion started by: Verifone
2 Replies
4. UNIX for Dummies Questions & Answers
hi,
i need to execute/visit a site to check if the site is up or not i have a server that have cron shedule that can execute a php file now how can i execute/visite a site using the same way as i execute a file?
thanks a lot for your help :) (1 Reply)
Discussion started by: jasonx22
1 Replies
5. Shell Programming and Scripting
Hi there,
Hi have a group of computers + a server (all debians) connected to each other on a LAN.
For some reasons that I've not decided and that I can't change, the computers cannot connect to the net. Moreover, the server has no ntp service.
Though, I need to find a way of setting all... (4 Replies)
Discussion started by: chebarbudo
4 Replies
6. Linux
All,
I need to write a script which can determine if my NTP client is X second off from the NTPD server time. I am looking for a crafty oneliner to calculate the time difference? (3 Replies)
Discussion started by: vada010
3 Replies
7. HP-UX
Hi
I wonder if its possible to setup NTP clients running HP-UX o.s. from a solaris 10 NTP server?
FR (3 Replies)
Discussion started by: fretagi
3 Replies
8. Solaris
Hi,
Could someone Please clarify me here:
Is ntpdate command a part of ntpd, i mean does ntpdate command a dependent on ntpd? and can ntpdate be run in absence of ntpd service. (5 Replies)
Discussion started by: aksijain
5 Replies
9. Red Hat
Hi,
I have two ntp servers in my cluster and I want all the nodes in my cluster to sync with either of the ntp servers or just one. Unfortunately it keep rotating the sync, between my ntp server 1, ntp server 2 and local. Is there anyway I can change the sync to avoid local?
# ntpq -p
... (3 Replies)
Discussion started by: pjeedu2247
3 Replies
10. UNIX for Dummies Questions & Answers
Good Morning
I need your help please, i tried to execute this script using nohup command but it gets in status stopped
nohup ./SapInterfases.sh > SapInterfases.log &
prodstg02$ jobs
+ Stopped(SIGTTOU) nohup ./SapInterfases.sh > SapInterfases.log &
I check out log:
$ more... (15 Replies)
Discussion started by: alexcol
15 Replies
LEARN ABOUT ULTRIX
ntp.conf
ntp.conf(5) File Formats Manual ntp.conf(5)
Name
ntp.conf - Network Time Protocol configuration file
Description
The file is the configuration file for the Network Time Protocol (NTP) daemon, This file must be configured on your system before running
Any host names that you specify in the file must have an entry in the file, or an entry in the master database, if the database is being
served to your system by BIND/Hesiod or Yellow Pages.
The file has four entry formats:
trusting no
This entry guarantees that your system synchronizes only to the NTP servers identified in the peer and server entries specified. Dig-
ital recommends that all systems include the entry.
peer server
This entry identifies server as one of the NTP servers that your system trusts, and from which your system will accept time synchro-
nization. Your system may also provide time synchronization to this server. Servers can be identified by host name or internet
address.
NTP servers should be configured with entries.
server server
This entry identifies server as one of the NTP servers that your system trusts, and from which your system will accept time synchro-
nization. Your system can not provide time synchronization to this server. Servers can be identified by host name or internet
address.
NTP clients should be configured with entries.
peer /dev/null LOCL 1 -5 local
This entry identifies your system as a local reference clock. A local reference clock is the most accurate system clock available at
your site. If you receive time synchronization from the Internet NTP service, you should not include this entry on any of your sys-
tems. At most, one system in a set of nodes running should be identified as a local reference clock.
A host which specifies this entry should not specify any or entries.
Examples
This is a sample configuration file for an NTP client which receives time synchronization from the NTP servers: and Lines beginning with a
number sign (#) are comments.
#
# NTP Configuration File
# This file is mandatory for the ntpd daemon
#
#
#
# ** A L L **
#
# "trusting no" prevents this host from synchronizing
# to any host that is not listed below. It is recommended
# that all hosts include the line "trusting no".
#
trusting no
#
#
# ** S E R V E R **
#
# If you are configuring a server, use "peer" entries to
# synchronize to other NTP servers. For example, server1,
# server2, and server3.
#
#peer server1
#peer server2
#peer server3
#
#
#
#
# ** C L I E N T **
#
# If you are configuring a client, use "server" entries to
# synchronize to NTP servers. For example, server1, server2,
# and server3.
#
server server1
server server2
server server3
#
#
#
# ** L O C A L R E F E R E N C E C L O C K **
#
# If you are configuring a local reference clock, include the
# following entry and the "trusting no" entry ONLY.
#
#peer /dev/null LOCL 1 -5 local
#
See Also
ntp(1), ntpd(8), ntpdc(8)
RFC 1129--Internet time synchronization: The Network Time Protocol
Introduction to Networking and Distributed System Services
ntp.conf(5)