Thank you very much, all is working perfectly. I am using ntp.nic.cz (CZ NIC is cz TLD registry), tak.cesnet.cz (CESNET is czech academic network) and 1.cz.pool.ntp.org. I think, that this servers are good? Am I right? Or is better to use more NTP servers? Thanks 2008/9/6 John R Pierce <pierce at hogranch.com> > happymaster23 wrote: > >> Hello everyone, >> >> I have problem with time delaying on my CentOS powered server. I have >> tried to set time in BIOS and in OS (with saving time to BIOS), but time >> still delaying, so after month is about five minutes delayed. In past I was >> using this box with Windows and there wasn´t this time problem, but I cant >> warrant, that there are no hardware issues. So I was decided, that easiest >> way to fix this problem will be setting up the NTP. I have found many >> howtos, but I don´t believe them. So my question is: How to clearly set NTP >> in CentOS 5? >> > > > # yum install ntp > > then, edit /etc/ntp.conf, and at a minimum specify some ntp servers and > restrict access to localhost... > > restrict 127.0.0.1 > restrict -6 ::1 > > # Use public servers from the pool.ntp.org project. > # Please consider joining the pool (http://www.pool.ntp.org/join.html). > server ntp1.sf-bay.org > server ntp2.sf-bay.org > server reloj.kjsl.com > server ntp1.mainecoon.com > server ntp2.mainecoon.com > server time.berkeley.netdot.net > > > > (note, those are the LOCAL TO ME ntp servers that *I* am using, you should > undoubtedly use others as appropriate, or use the pool servers... see > http://ntp.isc.org/bin/view/Servers/WebHome for guidelines)... > > finally... > > # chkconfig ntpd on > # service ntpd start > > and wait about 20 mins for it to sync up, and verify functionality with > ntptrace... > > # ntptrace > localhost.localdomain: stratum 3, offset 0.004351, synch distance > 0.088396 > zorro.sf-bay.org: stratum 2, offset 0.000543, synch distance 0.044773 > clock.via.net: stratum 1, offset 0.000027, synch distance 0.000446, > refid 'GPS' > > if your systems clock is particularlly funky, it may be a good idea to > edit, /etc/sysconfig/ntpd and set SYNC_HWCLOCK=yes rather than no. > (this tells it to set your HW CMOS clock when it sets the system clock > during the initial synchronization) > > > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.centos.org/pipermail/centos/attachments/20080908/a30595e4/attachment-0005.html>