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When installing Oracle 11g RAC, We need to configure the ntp service. There are many ways to configure the clock synchronization mode when using virtual machines. You can use the clock synchronization feature provided by vmware or directly use a local node as the time server. This article describes how to directly
Environment:
NTP Server:centos 6.6 x86_64 192.168.8.250NTP Client:centos 6.6 x86_64 192.168.8.90
First, NTP introduction
1.NTP Service Introduction
NTP (the network time Protocol) is a network time protocol for synchronizing computers in a network.It is negotiated with a specific algorithm through UDP packet switch
(in seconds) Reach: This is an octal value, indicates the number of times that the NTP server has requested updates. Every successful connection, its value is added with 1 delay: the delay time during network transmission, in the unit of microsecond offset: time difference between our local machine and the server. Unit: millisecond jitter: time difference betwee
NTP to request. NTP listens for requests through UDP 123 ports.You can see the time source in use by using the following command: W32tm/monitor, which displays the host name of the time source server you are using.Configure an external, reliable time sourceBecause the BIOS clock is not very reliable, again we need to manually
, ntp4, ntp-4.2, ntp-4.2.6p4.tar.gz# Tar zxvf ntp-4.2.6.tar.gz# Cd ntp-4.2.6#./Configure -- prefix =/usr/local/ntp -- enable-all-clocks -- enable-parse-clocks# Make make install
Ii. NTP
When installing Oracle 11g RAC, we need to configure the NTP service. In the case of a virtual machine, there are many ways to configure the clock synchronization method, either using VMware's own clock synchronization feature or directly using a local node as a time server. This article describes the clock
First, build preparation1. Determine your time zone#date命令可以查看当前系统时间, China's time zone is CST. To configure the time zone using the Tzselect command 650) this.width=650; "border=" 0 "src="/e/u261/themes/default/images/spacer.gif "style= " Backgroun D:url ("/e/u261/lang/zh-cn/images/localimage.png") no-repeat center;border:1px solid #ddd; "alt=" Spacer.gif "/>Configuration file Modification:/etc/sysconfig/clock2. Check
/local/ntp[[email protected] ~]# CD NTP -4.2.8p3[[email protected] ntp]#./configure--prefix=/usr/local/ntp--enable-all-clocks--enable-parse-clocks # Note: The current system time must be new to the file creation time when the installation profile is generated, otherwise an e
Build an NTP server in Linux
BackgroundWhen there are too many servers, it is a big problem whether the time is accurate or not. Although this problem is always ignored, it is necessary to unify the time. The following describes how to configure the Linux time server in the LAN.
For example, if the IP address range is
CentOS NTP server installation and configuration
BackgroundWhen there are too many servers, it is a big problem whether the time is accurate or not. Although this problem is always ignored, it is necessary to unify the time. The following describes how to configure the Linux time server in the LAN.
Configuration enviro
Linux Time synchronization Server SetupNTP(Network Time Protocol) is used to make the computerTime Synchronizationudp protocol 123 The port provides services externally, it can make the computer to its server or clock source (such as quartz clock, gps and so on to do time synchronization, it can provide high accuracy time correction (lan is less than the standard difference between 1 milliseconds, wa
check, and then configure the Yum Warehouse, yum mode installation is OK, as follows:[[email protected] ~]# Rpm-qa NTPntp-4.2.6p5-1.el6.centos.x86_64 //This means that it is installed and if it is not installed, this is blank. If it is not installed, we will install it:# yum Install NTPInstall the NTP package on each server in the intranet as per the above inst
Installing NTP
wget http://www.eecis.udel.edu/~ntp/ntp_spool/ntp4/ntp-4.2/ntp-4.2.6p3.tar.gz
Tar ntp-4.2.6p3.tar.gz
CD NTP-4.2.6P3
./configure--PREFIX=/USR/LOCAL/
Install the Configure NTP SERVER on CentOS 6.2
To install NTP:Yum Install NTP
Configure the time sourceVi/etc/ntp.confServer 210.72.145.44Server ntp.api.bzServer 2.centos.pool.ntp.org
Configure
In the production environment, linux server time synchronization is important. The following describes how to build a time server.1. Set up a time server1. Install ntp server on a linux serverTar zxvf ntp-4.2.6.tar.gzCd ntp-4.2.6.
In Centos6.3, the ntp time server-linux Enterprise Application-Linux server application information is implemented. For more information, see the following section. Network Time Protocol (NTP) is a standard Internet Protocol used for Time synchronization on the Internet. NTP
recently, found that the company domain member user time and the domain server time is not synchronized, to achieve: 1, the domain member server and intra-domain client and domain NTP server synchronization, 2, the domain NTP server
Linux configuration NTP serverBackgroundWhen the server is more, time is accurate or not, the same is a big problem. Although this problem is always overlooked, it is necessary to unify the time. Here's how to configure a Linux time server within a LAN.Configuration of the environment and requirements:1. Assume that a
3. View the status of NTP server and upper NTP
# ntpq-p
remote refid St T when poll reach delay offset jitter
============================= =================================================
news.neu.edu.cn. INIT. U - 0 0.000 0.000 0.000
x202.118.1.130 202.118.1.47 2 U 7 377 153.659 9.605 19.941
*time4.aliyun.co 10.137.38
Linux and cloud Computing--the second phase of Linux Server SetupThe first chapter: NTP Server Setup650) this.width=650; "Src=" Http://s4.51cto.com/wyfs02/M02/84/7C/wKiom1eR3EWj8CJjAAECGMnPQ_I264.jpg-wh_500x0-wm_3 -wmp_4-s_2524553483.jpg "title=" server. jpg "alt=" wkiom1er3ewj8cjjaaecgmnpq_i264.jpg-wh_50 "/>1.
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