OBTW, I forgot to mention, one of the most common uses of ntpdate is in the root crontab file, for example:
From the shell:
Also, here is a site dedicated to helping you find a valid time server for your site:
Quote:
The pool.ntp.org project is a big virtual cluster of timeservers providing reliable easy to use NTP service for millions of clients.
The pool is being used by millions or tens of millions of systems around the world. It's the default "time server" for most of the major Linux distributions and many networked appliances (see information for vendors).
Hello,
I'm looking for assitance on setting up network time protocol on my HP-ux boxes.
I have edit the .conf file accordingly. And /etc/services. But whenever I try and start the service nothing happens at all. No error message, nothing.
I have a SCO box as a time server and I wish... (0 Replies)
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)
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)
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)
as advised and documented, i'm trying to use the ntpd -gq instead of ntpdate. The result is that clock not set. as below. However ntpdate is working ok and had set the clock correctly
this is the ntp.conf file:
# cat /etc/ntp.conf
logfile /var/log/ntp.log
driftfile /var/lib/ntp/drift... (6 Replies)
Hi,
Could somebody please explain me.
why is it necessary to execute the "ntpdate" command only when ntp daemon is stopped , and also the probabale solution to reduce the high offset value.
Thanks !!
Laxxi (4 Replies)
Hi all. I'm new to this forum and Linux in general. Last month I ran into a problem at work and never got around to solving it.
We have an old Linux workstation that synchs its time to a Windows XP machine running w32time. The version of ntpdate is 4.2.0.a running on Linux kernel 2.6.17.6. It... (0 Replies)
Discussion started by: rathauneek
0 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 Alsontp(1), ntpd(8), ntpdc(8)
RFC 1129--Internet time synchronization: The Network Time Protocol
Introduction to Networking and Distributed System Services
ntp.conf(5)