CentOS 5 :: Ntpd -gq Not Working?
Aug 29, 2010
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:
[root@CentOS5 ~]# cat /etc/ntp.conf
logfile /var/log/ntp.log
driftfile /var/lib/ntp/drift
server 0.centos.pool.ntp.org
this is the output of command:
[root@CentOS5 ~]# ntpd -dqg
ntpd 4.2.2p1@1.1570-o Sat Dec 19 00:58:16 UTC 2009 (1)[code]....
Also attached is the trace file, from the trace file, everything seems ok, timestamps is sent and received:
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Mar 30, 2011
[root@espeed log]# /etc/init.d/ntpd start
Starting ntpd: ntpd: error while loading shared libraries: libm.so.6: cannot open shared object file: No such file or directory
[root@espeed log]# ldd /usr/sbin/ntpd
linux-gate.so.1 => (0x00786000)
libm.so.6 => /lib/libm.so.6 (0x0059d000)
[code]....
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Apr 1, 2010
I am facing issue in ntp, it is getting killed frequently. see below error; # /etc/init.d/ntpd status ntpd dead but pid file exists After starting service it is works fine but again after sometimes it get in dead postition.
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Aug 30, 2010
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:
Code:
[root@CentOS5 ~]# cat /etc/ntp.conf
logfile /var/log/ntp.log
driftfile /var/lib/ntp/drift
server 0.centos.pool.ntp.org
This is the output of command:
Code:
[root@CentOS5 ~]# ntpd -dqg
ntpd 4.2.2p1@1.1570-o Sat Dec 19 00:58:16 UTC 2009 (1)
addto_syslog: precision = 1.000 usec
create_sockets(123)
addto_syslog: ntp_io: estimated max descriptors: 1024, initial socket boundary: 16 .....
clock_filter: n 6 off 42905.489022 del 0.390840 dsp 0.000132 jit 4.733917, age 12
16 addto_syslog: no reply; clock not set
Also attached is the trace file, from the trace file, everything seems ok, timestamps is sent and received:
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Dec 16, 2009
I have a Windows 2003 server that runs a Win32 time server which synchronizes with off site time sources. I have a CentOS 5.4 server which I just configured and installed NTP on. For some reason, I keep getting time discrepancies even after the server is (apparently) synching with my local NTP server on the Windows box.
Hwclock is set to UTC true/etc/localtime is properly symlinked to appropriate /usr/share/zoneinfo fileNTPD is setup as a service which loads on startupNTP.conf is configured to only retrieve from my local Windows 2003 time serverntpq -p seems to verify that the system is indeed synching up properlyThe problem is, whenever I run the 'date' command it is displaying my system time in (presumably) UTC. That is, even though my the CentOS box appears to be synching up to the local time, it's not translating it into my proper time zone. Consequently, the date is always at -6 hours from the actual local time. It was my understanding that the hwclock is fine to remain at UTC as ntpd should be synching with my local Windows 2003 time server periodically and updating it, and the system time should be getting translated to my localtime.
what I do, after rebooting the box the hwclock and system clock display the improper time.Maybe I just have a fundamental misunderstanding of how this is supposed to operate.Update: I'm not sure why, but after I commented out the other servers and added a fudge declaration for my internal server and rebooted, everything is working as it should and the time is correct.I'm still not really sure if it was adding the "fudge <hostname> stratum 2" declaration that corrected things, or commenting out the additional hosts, so I'll leave this open if anyone cares to comment or contribute.
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Jan 27, 2009
I have a server running VMWare Server on it with 4 virtual machines running. I am trying to use NTPD to keep the time correct on all of the virtual machines. On my physical server, I have installed ntpd and this is it's config file:
Quote:# ntpd.conf
tinker panic 0
restrict 127.0.0.1
restrict default kod nomodify notrap
server 0.vmware.pool.ntp.org
server 1.vmware.pool.ntp.org
server 2.vmware.pool.ntp.org
[Code]...
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Nov 20, 2009
I'm having a problem with the time on one of my servers jumping forward into the future. We run serveral CentOS 5.4 servers running Xen, some up to date and some a little older. The one in question is running 2.6.18-164.el5xen, with xen-libs-3.0.3-94.el5_4.2 and xen-3.0.3-94.el5_4.2. On this server are several Xen virtual machines, also running CentOS 5.4 with kernel 2.6.18-164.el5xen. One in particular has problems with the clock keeping proper time.
We use NTP (ntpd) to sync time to a central server in the company. Our NTP set-up works fine, and we have problems on only a couple of servers out of many. The problem I see is that one one particular Xen virtual machine, the clock will suddenly jump forward into the future, usually by several minutes but once by more than an hour. This has obvious implications for software running on the machine. Software such as Oracle grid control agent will restart itself under the (incorrect) assumption that it has been hung for several minutes with no activity. Oracle database will cope gracefully, but applications that refer to the clock will be confused.
We detect these time jumps because we have Nagios checking the clock on each host against the centralised time server (Nagios's check_ntp plugin). Nagios will suddenly report a clock offset that is miles into the future. Following the time jump, ntpd on the host in question will re-sync the time. Ntpd keeps the time steady, ticking just a few milliseconds per second until real time catches up with the server. i.e. Nagios will report the time as being 10 minutes ahead, then a minute later the host will be 9 minutes ahead, and then a further minute later the host will be 8 minutes ahead of real time. The clock on the host stays running very slow until it eventually is correct.
[Code]...
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Sep 1, 2010
ntpd startup fails during boot.Does startup just fine manually from command line once it's booted though. Any suggestions what I might adjust?
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Jan 21, 2011
I am running a centOS 5.5 server and can't synchronize with time servers via ntpd. My server sits behind a firewall with only port 80 open and I suspect this is the issue. Do I need to open other ports to connect to the time servers at [URL]?
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Jan 8, 2010
I cant get ntpd to synchronize with the ntp servers. I have a CentOS 5.3 32 bit Virtual Machine. I'm in USA on Pacific Standard Time. Here's all configuration and other important information for troubleshooting. Is there anything wrong with my config? btw, I used wireshark to look at the UDP packets - I dont get any responses from any of the servers back. I only see requests going out from my server, but no response. Is this a firewall Issue? If it is, then do I need to just enable UDP port 123 on the firewall?
[Code]...
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May 7, 2010
I am rebuilding / updating my internal server. It is strange to me that 11.0 will not install on this ASUS M3A78 MB but 11.2 will go through. I am setting up the ntp server and run into new things, ntpdate is not used anymore so you have this long string : sntp -P no -r pool.ntp.org which does the same thing or a couple of other calls that may work. It seems that pool.ntp.org will not work however so I switched to another time server.
pool.ntp.org does work on 11.0 however, it still uses ntpdate atm.
I can use ntpdate to my server from other clients and get the time but I can't use Yast to set it up, it hangs (or maybe it will eventually time out) when you test the server in the gui tool. rcntp ntptimeset comes back with no server reached on the ntp server machine so I am not confident that it will auto update itself, which I think is an issue, the server will not respond to client queries after a day or two.
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Nov 24, 2010
I can compile and run ntpd 4.2.6p2, but after a while the reach indicator falls back from 377 to 0 and then the ntpd is in an unsynced state for a while. So far I haven't seen any indication why we have this.
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Mar 22, 2010
I am trying to synchronize the time of my VM server with ntpd. I have the following configuration. And in the /etc/ntp.conf, I have the following line:
restrict default ignore
restrict 127.0.0.1.
server time1.server
server time2.server
Whenever I have this line, the erver is not able to synchronize its time... So far as I understood, this line prevents other servers using this machine as a time server. And the second line says to allow localhost to use as time server. But why do I need to use its own time server when I have specified to use time1.server and time2.server ? ( firewall for tcp and udp ports 123 is open)
However, when I replace the first line of the configuration with the following line, it works. restrict default kod nomodify notrap noquery But with this, i am allowing other servers to use this server a ntp (which I wouldn't like to). Why this machine tries to use ntp server of its own (to snyc time) and why it is not working though i have the entry "restrict 127.0.0.1" ??
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Feb 10, 2011
NTPD on Fedora 14.
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Aug 31, 2010
I use Arch, but no info about it in official wiki.
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Apr 8, 2009
I have a problem with a server with os Linux RedHat Enterprise AS 4.7:
when the server boots both ntpd and rpc.statd fail to start.
looking into /var/log/messages I found:
and
For ntp, when the server completed the boot process, altough it seems ntpd started, no external server is used for syncronization. The rpc.statd does not start at all and it doesn't appear if I issue a rpcinfo -p
The strange thing is that at this point if I manually start or restart /etc/init.d/ntpd and /etc/init.d/nfslock both services start with no errors. Another strange thing is the timestamp for messages into /var/log/messages. How could it be possible to have a line with a certain timestamp and the following with a timestamp 30 seconds before?
The kernel version in use is 2.6.9-55.0.12.ELsmp #1 SMP x86_64
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Jun 28, 2010
I'd like to get the 13.0 "synchronized to <time server>, stratum <stratum>" messages back on 13.1.
- On 13.0, running ntpd 4.2.4p8, reassuring messages appeared in /var/log/messages like "synchronized to 211.233.84.186, stratum 2".
- On 13.1, running ntpd 4.2.6p1, there are no messages in /var/log/messages to confirm that time is being synchronised.
rc.ntpd on both starts ntpd with the same options. /etc/ntp.conf is identical on both, a "get it working and then make it secure" version:
Code:
cat /etc/ntp.conf | grep -E -v '^$|^#' cat /etc/ntp.conf | grep -E -v '^$|^#'
server in.pool.ntp.org
server asia.pool.ntp.org
server 127.127.1.0
fudge 127.127.1.0 stratum 10
driftfile /etc/ntp/drift
According to Linux Home Networking, synchronization can be checked using ntpq -p. This shows synchronization is working. I would prefer to see that confirmation in /var/log/messages without having to run a command manually to check it. How to get the old messages back?
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Jul 19, 2011
I'm trying to sync my clock. I think I would like to do this by the "ntpd" daemon running. I think it should start up on boot, but it doesn't.
I have the following in my /var/log/syslog:
Jul 18 23:44:14 neo ntpd[1780]: ntpd 4.2.6p2@1.2194-o Sun Oct 17 13:45:13 UTC 2010 (1)
Jul 18 23:44:14 neo ntpd[1781]: proto: precision = 0.634 usec
Jul 18 23:44:14 neo ntpd[1781]: unable to bind to wildcard address 0.0.0.0 - another process may be running - EXITING
Jul 18 23:44:14 neo ntpdate[1194]: step time server 72.26.125.125 offset -0.505108 sec
Other posts say if ntpd and ntpdate run too close together, they cause one to think the other is locking a resource. It works to type "ntpdate pool.ntp.org" to manually update the clock. My Debian version is squeeze (6.0.2)
It works to start the ntpd daemon manually:
... sudo /etc/init.d/ntp start
... Starting NTP server: ntpd.
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Mar 29, 2011
I am having a situation with an NTPD server.
Code:
remote refid st t when poll reach delay offset jitter
plesk2.datacent .INIT. 16 u - 64 0 0.000 0.000 0.000
91.198.87.118.b .INIT. 16 u - 64 0 0.000 0.000 0.000
core.fr.zeroloo .INIT. 16 u - 64 0 0.000 0.000 0.000
178-26-105-100- .INIT. 16 u - 64 0 0.000 0.000 0.000
and it remains so no matter how long I wait...
Hoping to get better results with ntpdate, I stopped NTPS and tried :
Code:
# ntpdate ntp.skynet.be
29 Mar 09:12:26 ntpdate[4715]: no server suitable for synchronization found
# ntpdate -ud ntp.skynet.be
29 Mar 09:14:02 ntpdate[4814]: ntpdate 4.2.4p4@1.1520-o Sun Nov 22 16:14:35 UTC 2009 (1)
transmit(195.13.23.5)
receive(195.13.23.5) .....
I am running Debian Lenny 64b, and every packages are totally updated. I have 25 identical servers. And there is just one giving me this problem. From what I see, it is not a connection/FW issue since ntpdate get replies from the ntp server (ntp.skynet.be is my isp's stratum 2 ntp server).
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Mar 25, 2010
I have recently installed Slackware 13 (64bit) (Kernel 2.6.29.6) on an Acer Veriton M series with AMD Athlon cpu. I have started ntpd server and from it's log file it seems to be synchronising to each of the three stratum 2 servers specified in the ntp.conf file.
25 Mar 18:27:02 ntpd[4542]: time reset +2.163491 s
25 Mar 18:33:08 ntpd[4542]: synchronized to 130.88.200.4, stratum 2
25 Mar 18:37:25 ntpd[4542]: synchronized to 130.88.200.6, stratum 2
25 Mar 18:42:59 ntpd[4542]: time reset +2.282097 s
25 Mar 18:49:21 ntpd[4542]: synchronized to 130.88.200.6, stratum 2
25 Mar 18:50:17 ntpd[4542]: synchronized to 130.159.196.118, stratum 2
25 Mar 18:55:57 ntpd[4542]: synchronized to 130.88.200.6, stratum 2
25 Mar 18:58:57 ntpd[4542]: time reset +2.147508 s
If I invoke ntpdate from another linux machine, that ntpdate reports that the stratum of the ntpd server is too high and won't use it.
transmit(192.168.175.8)
receive(192.168.175.8)
transmit(192.168.175.8)
receive(192.168.175.8)
transmit(192.168.175.8)
192.168.175.8: Server dropped: strata too high
server 192.168.175.8, port 123
stratum 16, precision -20, leap 11, trust 000
refid [192.168.175.8], delay 0.02577, dispersion 0.00000
transmitted 4, in filter 4
reference time: cf562778.a310c705 Thu, Mar 25 2010 18:18:32.636
originate timestamp: cf562cdd.048cbee3 Thu, Mar 25 2010 18:41:33.017
transmit timestamp: cf562cd0.56618ce2 Thu, Mar 25 2010 18:41:20.337
filter delay: 0.02579 0.02577 0.02579 0.02579
0.00000 0.00000 0.00000 0.00000
filter offset: 12.68024 12.68024 12.68024 12.68024
0.000000 0.000000 0.000000 0.000000
delay 0.02577, dispersion 0.00000
offset 12.680248
25 Mar 18:41:20 ntpdate[9683]: no server suitable for synchronization found
I have run ntpd on another platform with Slackware 12 (32bit) and never had any problems.
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Jul 6, 2010
Running "Red Hat Linux release 9".I want to setup ntpd service to synchronize with our internal ntp server./etc/ntp.conf:
Code:
# Prohibit general access to this service.
restrict default ignore
[code]....
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Jan 25, 2011
I've been trying to make sense out of this error report. I get it every once in a while on startup of my machine.
Code:
Summary:
SELinux is preventing /usr/sbin/ntpd access to a leaked netlink_route_socket
file descriptor.
Detailed Description:
[ntpd has a permissive type (ntpd_t). This access was not denied.]
SELinux denied access requested by the ntpd command. It looks like this is either a leaked descriptor or ntpd output was redirected to a file it is not allowed to access. Leaks usually can be ignored since SELinux is just closing the leak and reporting the error. The application does not use the descriptor, so it will run properly. If this is a redirection, you will not get output in the netlink_route_socket. You should generate a bugzilla on selinux-policy, and it will get routed to the appropriate package. You can safely ignore this avc.
Allowing Access:
You can generate a local policy module to allow this access - see FAQ [URL]
Additional Information:
Source Context system_u:system_r:ntpd_t:s0
Target Context system_u:system_r:firstboot_t:s0
Target Objects netlink_route_socket [ netlink_route_socket ]
Source ntpd
Source Path /usr/sbin/ntpd
Port <Unknown>
Host localhost.localdomain
Source RPM Packages ntp-4.2.6p2-7.fc14
Target RPM Packages
Policy RPM selinux-policy-3.9.7-3.fc14
Selinux Enabled True
Policy Type targeted
Enforcing Mode Enforcing
Plugin Name leaks
Host Name localhost.localdomain
Platform Linux localhost.localdomain 2.6.35.6-45.fc14.i686
#1 SMP Mon Oct 18 23:56:17 UTC 2010 i686 i686
Alert Count 1
First Seen Fri 21 Jan 2011 02:01:09 AM PST
Last Seen Fri 21 Jan 2011 02:01:09 AM PST
Local ID fb73799a-8d3c-4d9a-8c06-a0c1b6d4814e
Line Numbers
Raw Audit Messages
node=localhost.localdomain type=AVC msg=audit(1295604069.730:15): avc: denied { read write } for pid=1731 comm="ntpd" path="socket:[14643]" dev=sockfs ino=14643 scontext=system_u:system_r:ntpd_t:s0 tcontext=system_u:system_r:firstboot_t:s0 tclass=netlink_route_socket
node=localhost.localdomain type=SYSCALL msg=audit(1295604069.730:15): arch=40000003 syscall=11 success=yes exit=0 a0=8a1ad60 a1=8a1b040 a2=8a1b2c8 a3=8a1b040 items=0 ppid=1730 pid=1731 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm="ntpd" exe="/usr/sbin/ntpd" subj=system_u:system_r:ntpd_t:s0 key=(null)
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Jun 6, 2010
What configuration options in /etc/ntp.conf do I have to set to allow other computers to receive time from a ntpd server? I've tried removing "nopeers" and "noquery" from the restrict lines, but I can't see anything on port 123.
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Mar 15, 2010
How will configure ntpd server? I tried to do it but I am used to get synchronize failed error.
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Oct 29, 2010
I've installed a new fresh Centos 5.5 ..and after a lot of work..something starts to work (X now works with the new ATI HD5145 using ATI drivers) but i've a serious problemThe ethernet controller JMC250 JMicron PCI EXPR. doesent work at all so my notebook is out of the world !!!Here is some infos:rpm -q centos-release
centos-release-5-5.el5.centos
rpm -qa kernel* | sort
kernel-devel-2.6.18-194.el5
[code]....
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Dec 3, 2009
i am trying to get centos 5.4 installed and bootable on my 16gb flash drive, with persistent overlay using and ext3 formatted drive.i want to be able to boot into centos and be able to have all updates from yum, etc, saved when shutting down for my situation i cannot use vfat.
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Jul 20, 2011
I installed CentOS. NetworkManager successfully installed and launched. I can ping any IP from terminal but I can't open any site in browser except 127.0.0.1 I can't open IP of the modem 192.168.1.1 in browser also.
The results of some commands:
ifconfig
eth0Link encap: EthernetHWaddr 7D:60:00:00:00:00
inet addr: 192.168.1.5Bcast: 192.168.1.255Mask:255.255.255.0
inet6 addr: fe80::7f60:ff:fe00:0/64Scope:Link
[Code]....
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Mar 27, 2009
first of all, ill provide you with the package name i got [URL]...i went to /usr/src/redhat/SOURCES/bwbar-1.2.2 did ./configure ; make
then i get this problem : [root@server bwbar-1.2.2]# ./bwbar ./bwbar: /usr/local/lib/libpng12.so.0: no version information available (required by ./bwbar) i have installed libpng & libpng-devel
[Code]...
after looking around a bit i thought it would be better to get the sources from kernel.org directly and try to compile that one, but then i found it to have the exact same error. would be very nice if someone could direct me to a solution for this. i have the bwbar already installed on another server which runs CENTOS 4 , i installed it there AGES ago , so i dont really remember what was my method back then.
the CENTOS 5 server dose not like me installing bwbar on it for some reason. maybe its bwbar's fault?, im no coder so i hope anyone that got a clue could check this out for me.
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Aug 6, 2009
i have installed latest skype-2.0.0.72-centos.i586.rpm from the skype website. i have installed it at a datacentre which runs in headless mode the procedure i followed to start skype is
i)Xvfb :1 -screen 0 800x600x24 &
ii)export DISPLAY=localhost:1.0
iii)echo skypeusername skypepw | skype --pipelogin &
it seems the skype not working as i was unable to see this user's status as logged in from another skype account on a different system the architecture is: CentOS release 5.3 (Final) uname -r : kernel- .6.18-128.1.6.el5 uname -a: Linux localhost.localdomain 2.6.18-128.1.6.el5 #1 SMP Wed Apr 1 09:19:18 EDT 2009 i686 i686 i386 GNU/Linux
[Code]...
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Mar 31, 2010
I installed the latest version of Centos 5.4.It came with Xen version 3.0.2 I think.I am running it on a Dell R510. It supports hardware virtualization.I was able to virtualize Windows XP and Windows 2003 server on it by selecting the install from DVD option.I was having problems trying to get a PCI DekTek card seen by the virtualized Windows domains so I tried to upgrade XEN to 3.4.2.I used the repos available from Gitmo and it went easy.
The only problem is now that when I try to create a "New virtual host" it only allows me to use HTTP, FTP option and not the iso or DVD option. They are greyed out. I was wondering if anyone has had this problem and might know a work around for the Xen 3.4.2 problem. Perhaps a better location for the kernel or something.
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