## page was renamed from UpdateClockInSlackwareWithNTP
= NTP =
NTP is a TCP/IP protocol for synchronizing time over a network. 

== Slackware ==

=== Update clock ===
Run the command as superuser:
 * 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:
 * chmod 755 /etc/rc.d/rc.ntpd

Start the service manually:
 * /etc/rc.d/rc.ntpd start
 * /etc/rc.d/rc.ntpd status

Add ntp server
 * Edit /etc/ntp.conf
 * add '''server pt.pool.ntp.org'''


Check the offset in milliseconds
 * ntpdate -q pt.pool.ntp.org
 * ntpq -pn

== CentOS ==
 * 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 ==
 * apt-get install ntp
 * ntpdate -q pt.pool.ntp.org
 * service ntp stop
 * ntpdate  pt.pool.ntp.org
 * service ntp start
 * ntpq -pn

== FreeBSD 9.0 ==
Run the command:
 * ntpdate pool.ntp.org

Check the UTC date:
 * date -u

Edit the file '''/etc/rc.conf''':
 * ntpd_enabled="YES"

Start and check the NTPD service status:
 * /etc/rc.d/ntpd start
 * /etc/rc.d/ntpd status