Differences between revisions 15 and 16

NTP

NTP is a TCP/IP protocol for synchronizing time over a network.

Slackware

Update clock

Run the command as superuser:

   1 ntpdate pool.ntp.org
   2 sudo ntpdate pool.ntp.org

Date and time should be stored in UTC.

Info on slack docs:

http://docs.slackware.com/howtos:network-services:ntp

Enable the service:

   1 chmod 755 /etc/rc.d/rc.ntpd

Start the service manually:

   1 /etc/rc.d/rc.ntpd start
   2 /etc/rc.d/rc.ntpd status

Add ntp server

Edit /etc/ntp.conf
add server pt.pool.ntp.org

   1 server  127.127.1.0     # local clock                                           
   2 fudge   127.127.1.0 stratum 10
   3 server pt.pool.ntp.org
   4 driftfile /etc/ntp/drift
   5 # Don't serve time or stats to anyone else by default (more secure)             
   6 restrict default noquery nomodify
   7 # Trust ourselves.  :-)                                                         
   8 restrict 127.0.0.1

Check the offset in seconds

   1 ntpdate -q pt.pool.ntp.org # offset in seconds
   2 ntpq -pn

CentOS

   1 yum install ntp
   2 service ntpd start
   3 chkconfig ntpd on
   4 service ntpd stop
   5 ntpdate pt.pool.ntp.org # sync clock
   6 service ntpd start
   7 ntpdate -q pt.pool.ntp.org
   8 ntpq -pn

Ubuntu / Debian

   1 apt-get install ntp
   2 ntpdate -q pt.pool.ntp.org
   3 service ntp stop
   4 ntpdate  pt.pool.ntp.org
   5 service ntp start
   6 ntpq -pn

FreeBSD 9.0

Run the command:

   1 ntpdate pool.ntp.org

Check the UTC date:

   1 date -u

Edit the file /etc/rc.conf:

   1 ntpd_enabled="YES"

Start and check the NTPD service status:

   1 /etc/rc.d/ntpd start
   2 /etc/rc.d/ntpd status

Sync summer time Slackware

   1 timeconfig # set HW clock to UTC
   2 /etc/rc.d/rc.ntpd stop
   3 ntpdate pt.pool.ntp.org
   4 /etc/rc.d/rc.ntpd start

Windows

net start w32time
w32tm /config /manualpeerlist:pt.pool.ntp.org
w32tm /resync /force

-  ⇤ ← Revision 15 as of 2022-11-17 20:55:02 → 
  Size: 2151
  Editor: localhost
  Comment:
+   ← Revision 16 as of 2022-11-17 20:55:51 → ⇥
  Size: 2190
  Editor: localhost
  Comment:
-Deletions are marked like this.
+Additions are marked like this.
 Line 20:
- * chmod 755 /etc/rc.d/rc.ntpd
+{{{#!highlight sh
chmod 755 /etc/rc.d/rc.ntpd
}}}
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+Line 25:
- * /etc/rc.d/rc.ntpd start
 * /etc/rc.d/rc.ntpd status
+{{{#!highlight sh
/etc/rc.d/rc.ntpd start
/etc/rc.d/rc.ntpd status
}}}