Ntp

net-misc/ntp


Source Repository:Repository:Gentoo Portage Tree

http://www.ntp.org/

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)

News

Drobbins

New Squeezelite Ebuild

Squeezelite streams audio from Logitech Media Server, supporting FLAC, MP3, and hi-res DSD (SACD) formats.
2017-01-06 by Drobbins
Drobbins

New Raspberry Pi and ODROID builds

We now have builds that are optimized for various Raspberry Pi and ODROID systems.
2017-01-02 by Drobbins
Oleg

LLVM Targets

LLVM Targets
2016-12-08 by Oleg
More...

Ntp

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Installation

To install the NTP client and server, run the following command:

# 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

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:

# 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:

# rc
* Setting the clock via the NTP client 'ntpdate' ...   [ OK ]
Note

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:

# rc-update add ntpd
Note

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.

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

External Resources

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