ntp ntpq time
Comunnes para cliente y servidor:
sudo aptitude install ntp ntpdate
1. Actualizar configuracion:
sudo mv /etc/ntp.conf /etc/ntp.conf.old
sudo vim /etc/ntp.conf
# /etc/ntp.conf, configuration for ntpd; see ntp.conf(5) for help driftfile /var/lib/ntp/ntp.drift # pool.ntp.org maps to about 1000 low-stratum NTP servers. Your server will # pick a different set every time it starts up. Please consider joining the # pool: <http://www.pool.ntp.org/join.html> server 0.es.pool.ntp.org server 1.es.pool.ntp.org server 2.es.pool.ntp.org # By default, exchange time with everybody, but don't allow configuration. restrict -4 default kod notrap nomodify nopeer noquery restrict -6 default kod notrap nomodify nopeer noquery # Local users may interrogate the ntp server more closely. restrict 127.0.0.1 restrict ::1 # http://support.ntp.org/bin/view/Support/AccessRestrictions#Section_6.5.1.2. # In theory I should use IP addresses on 'restrict' restrict 0.es.pool.ntp.org mask 255.255.255.255 nomodify restrict 1.es.pool.ntp.org mask 255.255.255.255 nomodify restrict 2.es.pool.ntp.org mask 255.255.255.255 nomodify # LAN restrict 10.0.0.0 mask 255.255.255.0 nomodify notrap nopeer
2. Para NTP:
sudo /etc/init.d/ntp stop
3. Sincronizar (en este ejemplo el servidor es 0.es.pool.ntp.org)
ntpdate 0.es.pool.ntp.org
4. Arrancar NTP:
sudo /etc/init.d/ntp start
1. Actualizar configuracion:
sudo mv /etc/ntp.conf /etc/ntp.conf.old
sudo vim /etc/ntp.conf
# /etc/ntp.conf, configuration for ntpd; see ntp.conf(5) for help driftfile /var/lib/ntp/ntp.drift server time-1.dev.jj.com restrict -4 default ignore restrict -6 default ignore restrict 127.0.0.1 restrict ::1 restrict time-1.dev.jj.com
Sincronizamos el cliente contra el servidor (time-1.dev.jj.com) y permitimos acceso local, todo lo demas lo cerramos.
2. Parar NTP:
sudo /etc/init.d/ntp stop
3. Sincronizar (en este ejemplo el servidor es time-1.dev.jj.com)
ntpdate time-1.dev.jj.com
4. Arrancar NTP:
sudo /etc/init.d/ntp start