ntp customization

Time client setup

Usually ntp comes with the OS (bos.net.tcp.client). If not, e.g. for AIX versions <4.1.5, it may be obtained as extra freeware and installed e.g. under /opt, with appropriate links in /opt/bin

Immediate synchronization with e.g.:

   /usr/sbin/ntpdate de.pool.ntp.org
   # or:
   /opt/bin/ntpdate  de.pool.ntp.org

The file /etc/ntp.conf must contain the entries:

   server timeserver1.gsi.de # GSI only !
   server de.pool.ntp.org
   #
   driftfile /var/ntp.drift
   tracefile /var/ntp.trace

- If ntp comes as part of the base OS:
  Activate the ntp-line in /etc/rc.tcpip and start the respective subsystem:
```
   startsrc -s xntpd
```
- If ntp is installed as extra freeware:
  - Either
    adapt the etc/init.d/xntp script and put into /etc/rc.local
```
   /opt/bin/xntp start
```
  - Or
    1. Create a subsystem:
```
   mkssys -s xntpd -p /opt/bin/xntpd -a '-c /etc/ntp.conf' -u 0 -S -n 15 -f 9 -R -G local
```
    2. Start it in /etc/rc.local:
```
   startsrc -s xntpd
```
The file /etc/environment should define the correct time zone:
```
TZ=CET-1CED-2,M3.5.0,M10.5.0
```

Last update: 29-Dec-2012, M.Kraemer