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Configuring NTP on HP-UX

The idiosyncratic portion is modifying /etc/rc.config.d/netdaemons. Make sure following variables are defined and XNTPD is set to 1:

export XNTPD=1
export XNTPD_ARGS=


Make sure correct timezone is setup in /etc/TIMEZONE file (look for TZ variable):

Make sure the NTP servers are also defined in  /etc/ntp.conf :


Restart HP-UX ntp service:
# /sbin/init.d/xntpd stop && /sbin/init.d/xntpd start

Watch out log file /var/adm/syslog/syslog.log for errors:
# tail -f /var/adm/syslog/syslog.log

If clock were not syncronized make sure xntpd is running:
# ps -ef | grep xntpd

Note: SAM can also be used to configure NTP service under HP-UX, just start SAM and open time window.

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Old News ;-)

[Feb 09, 2020] How To Install And Configure Chrony As NTP Client

See also chrony Comparison of NTP implementations
Another installation manual Steps to configure Chrony as NTP Server & Client (CentOS-RHEL 8)
Feb 09, 2020 |

It can synchronize the system clock faster with better time accuracy and it can be very much useful for the systems which are not online all the time.

Chronyd is smaller in size, it uses less system memory and it wakes up the CPU only when necessary, which is better for power saving.

It can perform well even when the network is congested for longer periods of time.

You can use any of the below commands to check Chrony status.

To check chrony tracking status.

# chronyc tracking

Reference ID    : C0A80105 (
Stratum         : 3
Ref time (UTC)  : Thu Mar 28 05:57:27 2019
System time     : 0.000002545 seconds slow of NTP time
Last offset     : +0.001194361 seconds
RMS offset      : 0.001194361 seconds
Frequency       : 1.650 ppm fast
Residual freq   : +184.101 ppm
Skew            : 2.962 ppm
Root delay      : 0.107966967 seconds
Root dispersion : 1.060455322 seconds
Update interval : 2.0 seconds
Leap status     : Normal

Run the sources command to displays information about the current time sources.

# chronyc sources

210 Number of sources = 1
MS Name/IP address         Stratum Poll Reach LastRx Last sample               
^*          2   6    17    62    +36us[+1230us] +/- 1111ms

[Dec 05, 2010] IT Resource Center forums - How to setup and configure NTP

Some notes:

Configuring an NTP Server

1. Modify the /etc/rc.config.d/netdaemons file to configure xntpd daemon. Set XNTPD=1. export NTPDATE_SERVER= export XNTPD=1 export XNTPD_ARGS=

2. Modify /etc/TIMEZONE file. See /usr/lib/tztab for a list of all available time zones. TZ=CST6CDT export TZ

3. Modify /etc/ntp.conf file and define NTP server.

4. Run the xntpd daemon manually. #/sbin/init.d xntpd start

5. Wait. It could take up to 6 minutes for the xntpd daemon to start.

6. Verify the NTP server configuration (and its association with peer servers) by executing the command: #ntpq -p

Configuring an NTP Client

1. Modify the /etc/rc.config.d/netdaemons file on all clients and servers. export NTPDATE_SERVER=â?�server1 server2â?? export XNTPD=1 export XNTPD_ARGS=

2. Modify /etc/TIMEZONE file. See /usr/lib/tztab for a list of all available time zones. TZ=CST6CDT export TZ

3. Modify /etc/ntp.conf file and define NTP client.

4. Run the xntpd daemon manually. #/sbin/init.d xntpd start Wait. It could take up to 6 minutes for the xntpd daemon to establish an association with the corresponding NTP servers and peers.

6. Verify the NTP server configuration (and its association with peer servers) by executing the command: #nt

Test configuration with:

ntpq -p

In case you are using a server that uses its internal clock, its ntp.conf should look like:

server fudge stratum=10

For the clients you can have the entries in ntp.conf:

broadcastclient=yes driftfile /etc/ntp.drift


server server_name driftfile /etc/ntp.drift

Hi, ntp is the network time protocol service while xntpd is nothing but the daemon which is must to run the ntp service. In Your case. Login as root to Pluto server and: 1) Edit " /etc/rc.config.d/netdaemons " file on the Pluto Server as follows : export NTPDATE_SERVER= export XNTPD=1 export XNTPD_ARGS=

2)Edit " /etc/ntp.conf " file in the pluto server with the below entries at the end of the file :

server <Give the IP address of Pluto> 3) To Maually start xntpd daemon : # /sbin/init.d/xntpd start ON Jupiter side :

1)Edit " /etc/rc.config.d/netdaemons " file on the clients side as follows : export NTPDATE_SERVER=<Give the IP address of PlutoServer> export XNTPD=1 export XNTPD_ARGS= 2)Edit " /etc/ntp.conf " file on the Jupiter server and add below entries at the end of the file: server <IP Address of Pluto> 3)#/sbin/init.d/xntpd start

In case the time synchronisation doesn't start it will definately start at the reboot of respective servers. 95 % it will start w/o reboot.



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