Differences between revisions 3 and 17 (spanning 14 versions)

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
   7 #
   8 apt install -y ntp ntpsec-ntpdate ntpdate
   9 /sbin/ntpdate pt.pool.ntp.org
  10 /sbin/service ntp stop
  11 timedatectl set-timezone Europe/Lisbon
  12 /sbin/service ntp start

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 3 as of 2013-11-20 22:54:15 → 
  Size: 596
  Editor: 31
  Comment:
+   ← Revision 17 as of 2024-10-25 22:04:39 → ⇥
  Size: 2356
  Editor: vitor
  Comment:
-Deletions are marked like this.
+Additions are marked like this.
 Line 3:
+NTP is a TCP/IP protocol for synchronizing time over a network.
-Line 4:
+Line 5:
-== Update clock in Slackware with NTP ==
+== Slackware ==

=== Update clock ===
-Line 6:
+Line 9:
- * ntpdate pool.ntp.org
+{{{#!highlight sh
ntpdate pool.ntp.org
sudo ntpdate pool.ntp.org
}}}
-Line 14:
+Line 20:
- * chmod 755 /etc/rc.d/rc.ntpd
+{{{#!highlight sh
chmod 755 /etc/rc.d/rc.ntpd
}}}
-Line 17:
+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
}}}
-Line 24:
+Line 34:
+{{{#!highlight bash
server  127.127.1.0     # local clock                                           
fudge   127.127.1.0 stratum 10
server pt.pool.ntp.org
driftfile /etc/ntp/drift
# Don't serve time or stats to anyone else by default (more secure)             
restrict default noquery nomodify
# Trust ourselves.  :-)                                                         
restrict 127.0.0.1
}}}
-Line 25:
+Line 45:
-Check the offset in milliseconds
 * ntpdate -q pt.pool.ntp.org
 * ntpq -pn
+Check the offset in seconds
{{{#!highlight sh
ntpdate -q pt.pool.ntp.org # offset in seconds
ntpq -pn
}}}

== CentOS ==
{{{#!highlight sh
yum install ntp
service ntpd start
chkconfig ntpd on
service ntpd stop
ntpdate pt.pool.ntp.org # sync clock
service ntpd start
ntpdate -q pt.pool.ntp.org
ntpq -pn
}}}

== Ubuntu / Debian ==
{{{#!highlight sh
apt-get install ntp
ntpdate -q pt.pool.ntp.org
service ntp stop
ntpdate  pt.pool.ntp.org
service ntp start
ntpq -pn
#
apt install -y ntp ntpsec-ntpdate ntpdate
/sbin/ntpdate pt.pool.ntp.org
/sbin/service ntp stop
timedatectl set-timezone Europe/Lisbon
/sbin/service ntp start
}}}

== FreeBSD 9.0 ==
Run the command:
{{{#!highlight sh
ntpdate pool.ntp.org
}}}

Check the UTC date:
{{{#!highlight sh
date -u
}}}

Edit the file '''/etc/rc.conf''':
{{{#!highlight sh
ntpd_enabled="YES"
}}}

Start and check the NTPD service status:
{{{#!highlight sh
/etc/rc.d/ntpd start
/etc/rc.d/ntpd status
}}}

== Sync summer time Slackware ==
{{{#!highlight sh
timeconfig # set HW clock to UTC
/etc/rc.d/rc.ntpd stop
ntpdate pt.pool.ntp.org
/etc/rc.d/rc.ntpd start
}}}

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