Ntp

NTP is Network Time Protocol. It exists on both Solaris and Linux but is not started by default so it must be started using following procedure:

Solaris

1. login as 'root'

2. Create file /etc/inet/ntp.conf, or copy from another Solaris machine:

# peer host_address [ key # ] [ version # ] [ minpoll interval ] [prefer]
# server host_address [ key # ] [ version # ] [ minpoll interval ] [prefer]
# broadcast host_address [ key # ] [ version # ] [ minpoll interval ]
# driftfile filename
# broadcast yes|no
# broadcastdelay seconds
# authenticate yes|no
# authdelay seconds
# keys filename
# trustedkey # [ # ... ]
# controlkey #
# restrict address [ mask numeric_mask ] [ flag ] [ ... ]
# statsdir /directory/[ prefix ]
# statistics names
# filegen name [ file filename ] [ type typename ] [ link|nolink ] [enable|disable ]
# enabled/disabled
# link/nolink
# keyno  type  key
#
####################
#
# JLAB time servers
server ntp1.jlab.org  version 3  prefer  # stratum 2, Ver 3
server ntp2.jlab.org  version 3          # stratum 2, Ver 3
#
#
driftfile /etc/inet/ntp.drift

3. Start the ntp daemon:

svcadm enable network/ntp

4. Check if it is running:

svcs | grep ntp
   online         16:29:30 svc:/network/ntp:default

5. Make query to make sure everything is Ok:

ntpq -p
        remote           refid      st t when poll reach   delay   offset    disp
   ==============================================================================
   *ns1.jlab.org    time.nist.gov    2 u   27   64   77     0.46   -1.440  387.54
   +ccs1.jlab.org   time.nist.gov    2 u   27   64   77     0.43    1.798  386.89

NOTE: for Solaris 10 update 6 from CD's on clon05 it did not worked, have to start xntpd manuall !!!

Linux

1. Login as 'root'

2. Modify file /etc/ntp.conf commenting out lines

##server 0.pool.ntp.org
##server 1.pool.ntp.org
##server 2.pool.ntp.org

and adding lines

server ntp1.jlab.org
server ntp2.jlab.org

or copy file from another Linux machine.

You can use /usr/bin/system-config-date if available, in that case skip step 3 below. To do it manually:

3. Start daemon:

/etc/init.d/ntpd start
   Starting ntpd:                                             [  OK  ]

4. Check if it is running:

/etc/init.d/ntpd status
   ntpd (pid 15598) is running...

5. Make query to make sure everything is Ok:

ntpq -p
        remote           refid      st t when poll reach   delay   offset  jitter
   ==============================================================================
   ns1.jlab.org    192.43.244.18    2 u   57   64    7    0.245  35139.8   1.521
   ccs1.jlab.org   192.43.244.18    2 u   50   64    7    0.522  35138.7   1.351

6. To start service at next boot do following:

###chkconfig --add ntpd (normally linux has it already)
chkconfig --level 3 ntpd on
chkconfig --level 4 ntpd on
chkconfig --level 5 ntpd on
chkconfig --list ntpd
   ntpd            0:off   1:off   2:off   3:on   4:on   5:on    6:off

If 'chkconfig' tool does not exist, make symbolic links manually, for example:

/etc/rc0.d/K74ntpd -> ../init.d/ntpd
/etc/rc1.d/K74ntpd -> ../init.d/ntpd
/etc/rc2.d/K74ntpd -> ../init.d/ntpd
/etc/rc3.d/K74ntpd -> ../init.d/ntpd
/etc/rc3.d/S58ntpd -> ../init.d/ntpd
/etc/rc4.d/K74ntpd -> ../init.d/ntpd
/etc/rc4.d/S58ntpd -> ../init.d/ntpd
/etc/rc5.d/K74ntpd -> ../init.d/ntpd
/etc/rc5.d/S58ntpd -> ../init.d/ntpd
/etc/rc6.d/K74ntpd -> ../init.d/ntpd

NOTES:

/etc/sysconfig/clock sets whether the hardware clock is stored as UTC or local time.
Symlink /etc/localtime to /usr/share/zoneinfo/... to set your timezone.
Run ``date MMDDhhmm to set the current system date/time.
Type ``/sbin/hwclock --systohc [--utc] to set the hardware clock.

Daylight protocol

To obtain information about when time will be switched use following example:

zdump -v America/New_York | grep 2007

It must produces similar to following:

America/New_York  Tue Mar  6 16:55:25 2007 UTC = Tue Mar  6 11:55:25 2007 EST isdst=0 
America/New_York  Sun Mar 11 06:59:59 2007 UTC = Sun Mar 11 01:59:59 2007 EST isdst=0
America/New_York  Sun Mar 11 07:00:00 2007 UTC = Sun Mar 11 03:00:00 2007 EDT isdst=1
America/New_York  Sun Nov  4 05:59:59 2007 UTC = Sun Nov  4 01:59:59 2007 EDT isdst=1
America/New_York  Sun Nov  4 06:00:00 2007 UTC = Sun Nov  4 01:00:00 2007 EST isdst=0

Make sure dates are correct (V SOOTVETSTVII S POSLEDNIM RESHENIEM KPSS).