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Package:Ntp
Ntp
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Installation
To install the NTP client and server, run the following command:
root # emerge net-misc/ntp
Configuration
Client
The ntp-client command immediately synchronizes your clock, and has separate ntp sync settings from the daemon:
/etc/conf.d/ntp-client
- setting ntp-client upstream serversNTPCLIENT_OPTS="-s -b -u \ 0.pool.ntp.org 1.pool.ntp.org \ 2.pool.ntp.org 3.pool.ntp.org"
Server
The ntpd server is also an ntp-client of upstream servers. Ntpd continuously, and gradually synchronizes the local clock.
/etc/ntp.conf
- setting ntpd upstream servers# Pools for Gentoo users server 0.pool.ntp.org server 1.pool.ntp.org server 2.pool.ntp.org server 3.pool.ntp.org
Runtime
If you are interested only in synchronizing your local clock against servers, then only add ntp-client
to your list of services to start at boot:
root # rc-updated add ntp-client
After adding the ntp-client
service to the default
runlevel, the service can be started by executing the rc
command as root:
root # rc root ##g##* ##!g##Setting the clock via the NTP client 'ntpdate' ... [ OK ]
Executing the above command normally takes several seconds
If you are instead interested in running an NTP server, add ntpd
to your list of services to execute at boot:
root # rc-update add ntpd
ntpd
serves as both a client and a server
Hardware Clock
To write your NTP sync time to the hardware at shutdown, and read hw clock at start.
root # echo 'clock_hctosys="YES"' >> /etc/conf.d/hwclock root # echo 'clock_systohc="YES"' >> /etc/conf.d/hwclock root # rc-service hwclock restart root # rc-update add hwclock boot
External Resources
http://keetweej.vanheusden.com/query_ntp.php