Ntp

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net-misc/ntp


Source Repository:Gentoo Portage Tree
Homepage

Summary: Network Time Protocol suite/programs

Use Flags

openntpd
Allow ntp to be installed alongside openntpd
parse-clocks
Add support for PARSE clocks
samba
Provide support for Samba's signing daemon (needed for Active Directory domain controllers)

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Ntp

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Installation

# 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 servers
NTPCLIENT_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

# rc-update add ntpd
# rc-update add ntp-client
# rc


Hardware Clock

To write your NTP sync time to the hardware at shutdown, and read hw clock at start.

# echo 'clock_hctosys="YES"' >> /etc/conf.d/hwclock
# echo 'clock_hctosys="YES"' >> /etc/conf.d/hwclock
# rc-service hwclock restart
# rc-update add hwclock boot


External Resources

http://keetweej.vanheusden.com/query_ntp.php