from small one page howto to huge articles all in one place
 

search text in:




Other .linuxhowtos.org sites: www.linuxhowtos.org
toolsntoys.linuxhowtos.org



Last additions:
How to make X listen on port 6000

How to make X listen on port 6000

words:

34

views:

43599

userrating:

average rating: 1.5 (4 votes) (1=very good 6=terrible)


May, 25th 2007:
April, 26th 2007:
Apr, 10th. 2007:
Druckversion . pdf icon
You are here: Tutorials per portage category->net-misc->ntp


ntp is the Network Time Protocol suite.

Installing ntpd

First, make sure ntp/ntpdate are installed. The package is by default installed on Mandrake Linux and Redhat. If you do not have ntp installed you will find packages on your distributions install-cd(s).

On Gentoo Linux, install by typing --- emerge ntp

Configuration files for running ntp as daemon

ntpd manpage

Client Setup

Now, edit the following files:

--- /etc/ntp.conf

The only important thing is that the line contains server some.thing.org.

Example:

--- server ntp.uio.no driftfile /etc/ntp/drift broadcastdelay 0.008 authenticate no ---

Make sure you add ntpd as a boot (init) service.

Gentoo Linux: `rc-update add ntpd default` , `/etc/init.d/ntpd start`

(LAN) Server setup

To run a ntp server to sync the clocks on your lan, edit

--- /etc/ntp.conf

Example:

--- server fartein.ifi.uio.no prefer server ntp.uio.no server ntp.eunet.no

fudge 10.0.0.50 stratum 10

driftfile /etc/ntp/drift broadcastdelay 0.008

authenticate no ---

fudge tells the server to pass on the correct time to the given network interface. stratum is the level of time servers, 10 being the lowest. You only need a higher number if you will be acting as a public internet timeserver with fast bandwidth.

It makes sence to add a few servers. Select the best as prefer

Make sure you add ntpd as a boot (init) service.

Gentoo Linux: `rc-update add ntpd default` , `/etc/init.d/ntpd start`

Firewalls

ntp uses port 123, both UDP and TCP. Make sure this port is not blocked by a firewall.

If you are using iptables, you can open this port with

--- $IPTABLES -A INPUT -j ACCEPT -p tcp --dport 123

Known valid and working ntp servers

server adress Location
ntp.ipv6.viagenie.qc.ca IPV6 ONLY
clock.via.net
server fartein.ifi.uio.no Norway
server ntp.uio.no Norway
server ntp.eunet.no Norway
ntp.demon.co.uk UK
ntp.nasa.gov USA
bigben.cac.washington.edu USA
time-b.nist.gov USA
montpelier.ilan.caltech.edu USA
nist1.aol-ca.truetime.com USA
nist1.datum.com USA
time-a.timefreq.bldrdoc.gov USA
time-b.timefreq.bldrdoc.gov USA
time-c.timefreq.bldrdoc.gov USA
time.nist.gov USA
utcnist.colorado.edu USA
tick.usno.navy.mil USA
tock.usno.navy.mil USA
mizbeaver.udel.edu USA

Server List

Setting the clock at boot or using cron

I good idea is _not_ to run the ntpd daemon on clients as it uses about 1,7 MB memory, unless you are a server or have a box with a broken clock. Many boxes clocks do drift along on their own, a check every hour or day is generally a good idea.

rdate

rdate is a simple 3 kB tool for syncing the system clock to a server. It's options are `-p` to print the date on the given server, `-s` to set the system clock according to it (must be done as root) and `-u` to use the UDP protocol. Example:

`rdate -p sntp.lth.se`

rdate manual page

clockspeed

clockspeed is a very small tool for setting the clock and is, for clients, a much better alternative than installing the 4+ MB ntp package.

cron & ntp

You can simply add ntpdate as a cron job every now and then:

--- echo 'ntpdate -b server.dot.com' > /etc/cron.hourly/time.cron --- chmod a+x /etc/cron.hourly/time.cron

Most distributions come with a cron. dcron and Vixie cron are nice.

Gentoo & ntp-client

You can set the clock using ntp at boot (without starting the daemon) on Gentoo Linux by editing:

--- /etc/conf.d/ntp-client

The file should contain:

--- NTPDATE_CMD="ntpdate" NTPDATE_OPTS="-b your.server.here" ---

Then add ntp-client to the services started at boot:

--- rc-update add ntp-client default

You can check what services are started at boot with `rc-status`.


Page source:

Copyright (c) 2000-2004 Øyvind Sæther. Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled "GNU Free Documentation License".

back



Other free services
toURL.org
Shorten long
URLs to short
links like
http://tourl.org/2
tourl.org
.
Reverse DNS lookup
Find out which hostname(s)
resolve to a
given IP or other hostnames for the server
www.reversednslookup.org

New Packages

- as rdf newsfeed
- as rss newsfeed
- as Atom newsfeed
2018-11-16
acpid - 2.0.31
Ebuild name:

sys-power/acpid-2.0.31

Description

Daemon for Advanced Configuration and Power Interface

Added to portage

2018-11-16

consul - 1.4.0
Ebuild name:

app-admin/consul-1.4.0

Description

A tool for service discovery, monitoring and configuration

Added to portage

2018-11-16

dnscrypt-proxy - 2.0.18
Ebuild name:

net-dns/dnscrypt-proxy-2.0.18

Description

A flexible DNS proxy, with support for encrypted DNS protocols

Added to portage

2018-11-16

drone - 0.8.9
Ebuild name:

dev-util/drone-0.8.9

Description

A Continuous Delivery platform built on Docker, written in Go

Added to portage

2018-11-16

drone-cli - 1.0.1
Ebuild name:

dev-util/drone-cli-1.0.1

Description

Command-line interface for Drone

Added to portage

2018-11-16

firefox - 63.0.3
Ebuild name:

www-client/firefox-63.0.3

Description

Firefox Web Browser

Added to portage

2018-11-16

firefox-bin - 63.0.3
Ebuild name:

www-client/firefox-bin-63.0.3

Description

Firefox Web Browser

Added to portage

2018-11-16

keyutils - 1.6
Ebuild name:

sys-apps/keyutils-1.6

Description

Linux Key Management Utilities

Added to portage

2018-11-16

kodi-audiodecoder-modplug - 1.1.0-r1
Ebuild name:

media-plugins/kodi-audiodecoder-modplug-1.1.0-r1

Description

Modplug decoder addon for Kodi

Added to portage

2018-11-16

kodi-audiodecoder-modplug - 2.0.0
Ebuild name:

media-plugins/kodi-audiodecoder-modplug-2.0.0

Description

Modplug decoder addon for Kodi

Added to portage

2018-11-16

libodfgen - 0.1.7
Ebuild name:

app-text/libodfgen-0.1.7

Description

Library to generate ODF documents from libwpd and libwpg

Added to portage

2018-11-16

mdds - 1.4.3
Ebuild name:

dev-util/mdds-1.4.3

Description

A collection of multi-dimensional data structure and indexing algorithm

Added to portage

2018-11-16

metalog - 20181125
Ebuild name:

app-admin/metalog-20181125

Description

A highly configurable replacement for syslogd/klogd

Added to portage

2018-11-16

mpd - 0.21.3
Ebuild name:

media-sound/mpd-0.21.3

Description

The Music Player Daemon (mpd)

Added to portage

2018-11-16

samba - 4.9.2-r1
Ebuild name:

net-fs/samba-4.9.2-r1

Description

Samba Suite Version 4

Added to portage

2018-11-16

serverengine - 2.1.0
Ebuild name:

dev-ruby/serverengine-2.1.0

Description

A framework to implement robust multiprocess servers

Added to portage

2018-11-16

systemrescuecd-x86 - 5.3.2
Ebuild name:

app-admin/systemrescuecd-x86-5.3.2

Description

The .iso image of SystemRescueCD rescue disk, x86 (+ amd64) vari

Added to portage

2018-11-16

vault - 0.11.5
Ebuild name:

app-admin/vault-0.11.5

Description

A tool for managing secrets

Added to portage

2018-11-16

warden - 1.2.8
Ebuild name:

dev-ruby/warden-1.2.8

Description

General Rack Authentication Framework

Added to portage

2018-11-16

wireguard - 0.0.20181115
Ebuild name:

net-vpn/wireguard-0.0.20181115

Description

Simple yet fast and modern VPN that utilizes state-of-the-art crypto

Added to portage

2018-11-16

xmlsec - 1.2.27
Ebuild name:

dev-libs/xmlsec-1.2.27

Description

Command line tool for signing, verifying, encrypting and decrypting XML

Added to portage

2018-11-16

2018-11-15
bashdb - 4.4.1.0.0
Ebuild name:

app-shells/bashdb-4.4.1.0.0

Description

bash source code debugging

Added to portage

2018-11-15

checkbashisms - 2.18.9
Ebuild name:

dev-util/checkbashisms-2.18.9

Description

Perl script to check for commonly used bash features not defined by P

Added to portage

2018-11-15

chronograf - 1.7.3
Ebuild name:

net-analyzer/chronograf-1.7.3

Description

Monitoring, processing and alerting on time series data

Added to portage

2018-11-15

ck-sources - 4.14.81
Ebuild name:

sys-kernel/ck-sources-4.14.81

Description

Gentoo's genpatches for Linux ., with Con Kolivas' MuQSS process sche

Added to portage

2018-11-15

ck-sources - 4.18.19
Ebuild name:

sys-kernel/ck-sources-4.18.19

Description

Gentoo's genpatches for Linux ., with Con Kolivas' MuQSS process sche

Added to portage

2018-11-15

ck-sources - 4.19.2
Ebuild name:

sys-kernel/ck-sources-4.19.2

Description

Gentoo's genpatches for Linux ., with Con Kolivas' MuQSS process sched

Added to portage

2018-11-15

ck-sources - 4.9.137
Ebuild name:

sys-kernel/ck-sources-4.9.137

Description

Gentoo's genpatches for Linux ., with Con Kolivas' MuQSS process sche

Added to portage

2018-11-15

conky - 1.10.8-r4
Ebuild name:

app-admin/conky-1.10.8-r4

Description

An advanced, highly configurable system monitor for X

Added to portage

2018-11-15

cuneiform - 1.1.0-r3
Ebuild name:

app-text/cuneiform-1.1.0-r3

Description

An enterprise quality OCR engine by Cognitive Technologies

Added to portage

2018-11-15

davix - 0.7.1
Ebuild name:

net-libs/davix-0.7.1

Description

High-performance file management over WebDAV/HTTP

Added to portage

2018-11-15

grpc - 1.16.1
Ebuild name:

net-libs/grpc-1.16.1

Description

Modern open source high performance RPC framework

Added to portage

2018-11-15

grpcio - 1.16.1
Ebuild name:

dev-python/grpcio-1.16.1

Description

High-performance RPC framework (python libraries)

Added to portage

2018-11-15

grpcio-testing - 1.16.1
Ebuild name:

dev-python/grpcio-testing-1.16.1

Description

Testing utilities for gRPC Python

Added to portage

2018-11-15

grpcio-tools - 1.16.1
Ebuild name:

dev-python/grpcio-tools-1.16.1

Description

Protobuf code generator for gRPC

Added to portage

2018-11-15

grs - 0.7
Ebuild name:

app-portage/grs-0.7

Description

Suite to build Gentoo Reference Systems

Added to portage

2018-11-15

httparty - 0.16.3
Ebuild name:

dev-ruby/httparty-0.16.3

Description

Makes http fun Also, makes consuming restful web services dead easy

Added to portage

2018-11-15

img - 0.5.4
Ebuild name:

app-emulation/img-0.5.4

Description

Standalone daemon-less unprivileged Dockerfile and OCI container image buil

Added to portage

2018-11-15

keepalived - 2.0.10-r1
Ebuild name:

sys-cluster/keepalived-2.0.10-r1

Description

A strong & robust keepalive facility to the Linux Virtual Server p

Added to portage

2018-11-15

kodi-audioencoder-flac - 1.1.0-r1
Ebuild name:

media-plugins/kodi-audioencoder-flac-1.1.0-r1

Description

Flac encoder addon for Kodi

Added to portage

2018-11-15

kodi-audioencoder-flac - 2.0.1
Ebuild name:

media-plugins/kodi-audioencoder-flac-2.0.1

Description

Flac encoder addon for Kodi

Added to portage

2018-11-15

kodi-audioencoder-vorbis - 1.1.0-r1
Ebuild name:

media-plugins/kodi-audioencoder-vorbis-1.1.0-r1

Description

Vorbis encoder addon for Kodi

Added to portage

2018-11-15

kodi-audioencoder-vorbis - 2.0.1
Ebuild name:

media-plugins/kodi-audioencoder-vorbis-2.0.1

Description

Vorbis encoder addon for Kodi

Added to portage

2018-11-15

kodi-inputstream-adaptive - 2.3.9
Ebuild name:

media-plugins/kodi-inputstream-adaptive-2.3.9

Description

Kodi's Adaptive inputstream addon

Added to portage

2018-11-15

kodi-pvr-dvbviewer - 3.7.5
Ebuild name:

media-plugins/kodi-pvr-dvbviewer-3.7.5

Description

Kodi's DVBViewer client addon

Added to portage

2018-11-15

kodi-pvr-wmc - 2.4.1
Ebuild name:

media-plugins/kodi-pvr-wmc-2.4.1

Description

Kodi's Windows Media Center client addon

Added to portage

2018-11-15

kodi-visualization-goom - 1.1.0-r1
Ebuild name:

media-plugins/kodi-visualization-goom-1.1.0-r1

Description

Goom visualizer for Kodi

Added to portage

2018-11-15

libadalang - 2017-r1
Ebuild name:

dev-ada/libadalang-2017-r1

Description

high performance semantic engine for the Ada programming language

Added to portage

2018-11-15

liboauth - 1.0.3-r1
Ebuild name:

net-libs/liboauth-1.0.3-r1

Description

C library implementing the OAuth secure authentication protocol

Added to portage

2018-11-15

mesa - 18.2.5
Ebuild name:

media-libs/mesa-18.2.5

Description

OpenGL-like graphic library for Linux

Added to portage

2018-11-15

minio - 2018.11.15.01.26.07
Ebuild name:

net-fs/minio-2018.11.15.01.26.07

Description

An Amazon S3 compatible object storage server

Added to portage

2018-11-15

nfs4-acl-tools - 0.3.5
Ebuild name:

net-fs/nfs4-acl-tools-0.3.5

Description

Commandline and GUI tools that deal directly with NFSv4 ACLs

Added to portage

2018-11-15

percona-server - 5.7.23.24
Ebuild name:

dev-db/percona-server-5.7.23.24

Description

A fast, multi-threaded, multi-user SQL database server

Added to portage

2018-11-15

phpsysinfo - 3.2.10-r1
Ebuild name:

www-apps/phpsysinfo-3.2.10-r1

Description

A customizable PHP script that displays information about your system

Added to portage

2018-11-15

pyTenable - 0.3.0
Ebuild name:

dev-python/pyTenable-0.3.0

Description

Tenable API Library for Tenable.io and SecurityCenter

Added to portage

2018-11-15

reg - 0.16.0
Ebuild name:

app-emulation/reg-0.16.0

Description

Docker registry v2 command line client

Added to portage

2018-11-15

regexp_parser - 1.3.0
Ebuild name:

dev-ruby/regexp_parser-1.3.0

Description

A library for tokenizing, lexing, and parsing Ruby regular expressions

Added to portage

2018-11-15

rust - 1.29.1-r1
Ebuild name:

dev-lang/rust-1.29.1-r1

Description

Systems programming language from Mozilla

Added to portage

2018-11-15

rust - 1.29.2-r1
Ebuild name:

dev-lang/rust-1.29.2-r1

Description

Systems programming language from Mozilla

Added to portage

2018-11-15

rust - 1.30.1-r1
Ebuild name:

dev-lang/rust-1.30.1-r1

Description

Systems programming language from Mozilla

Added to portage

2018-11-15

rust-bin - 1.29.1-r1
Ebuild name:

dev-lang/rust-bin-1.29.1-r1

Description

Systems programming language from Mozilla

Added to portage

2018-11-15

rust-bin - 1.29.2-r1
Ebuild name:

dev-lang/rust-bin-1.29.2-r1

Description

Systems programming language from Mozilla

Added to portage

2018-11-15

rust-bin - 1.30.1-r1
Ebuild name:

dev-lang/rust-bin-1.30.1-r1

Description

Systems programming language from Mozilla

Added to portage

2018-11-15

thunderbird - 60.3.1
Ebuild name:

mail-client/thunderbird-60.3.1

Description

Thunderbird Mail Client

Added to portage

2018-11-15

thunderbird-bin - 60.3.1
Ebuild name:

mail-client/thunderbird-bin-60.3.1

Description

Thunderbird Mail Client

Added to portage

2018-11-15

vc - 1.4.0
Ebuild name:

dev-libs/vc-1.4.0

Description

SIMD Vector Class Library for C++

Added to portage

2018-11-15

vobject - 0.9.6.1
Ebuild name:

dev-python/vobject-0.9.6.1

Description

Python package for parsing and generating vCard and vCalendar files

Added to portage

2018-11-15

yarn - 1.12.3
Ebuild name:

sys-apps/yarn-1.12.3

Description

Fast, reliable, and secure node dependency management

Added to portage

2018-11-15

rdf newsfeed | rss newsfeed | Atom newsfeed
- Powered by LeopardCMS - Running on Gentoo -
Copyright 2004-2018 Sascha Nitsch Unternehmensberatung UG(haftungsbeschänkt)
Valid XHTML1.1 : Valid CSS : buttonmaker
- Level Triple-A Conformance to Web Content Accessibility Guidelines 1.0 -
- Copyright and legal notices -
Time to create this page: 5.9 ms