Time synchronization is important when the Linux service needs time-stamping. Here is a synchronization command that I used recently.ntpdateMy virtual machine is CentOS, install Ntpdateinstall ntpdateAnd thenSelect the NTP server in Shanghai Jiaotong University to synchronizentpdate ntp.sjtu.edu.cnCommonly used NTP addresses in ChinaAddress transferred from watercress (http://www.douban.com/note/171309770/)
This article describes in detail how to configure the NTP time synchronization server, and takes CISCO 7200 as an example. I hope this article will help you.
For the purpose of network management, we set up netflow to monitor traffic and obtain detailed access records for Intranet users to access the Internet. Such records can be accurate to seconds, the premise is that the time of the monitored vro or vswitch and other network devices must be absolut
Article Title: Considerations for NTP service configuration in Linux. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source.
In the standard configuration of NTP in Linux, many Synchronization Methods are different. Note the following:
If you do not want any other server to acc
Environment IntroductionNode1 as the NTP master node, all other nodes are synchronized from the Node1 time,Node IpNode1 192.168.20.101Node2 192.168.20.102
All nodes install the NTP package:yum install ntp
Modify the/etc/ntp.conf of the Node1 master node to add the following:
restrict 192.168.20.0 mask 255.255.255.0 nomodify notrapThat is, the se
To achieve time synchronization on the HP-UX, you need to set the time server and client, the relevant process is xntpd configuration file/etc/NTP. conf/etc/NTP. drift is created on the client and used as the drift file/etc/rc. config. d/netdaemons execution file/usr/sbin/xntpd run script/sbin/init. d/xntpd {START | stop} configuration method server side 1. edit/etc/NTP
Automatically synchronize the date and time of a linux host through network ntp
If you only need to synchronize data once, run the following command:
Rdate-s time.nist.gov
WhereTime.nist.govIs a time server, of course, you can also use another time server.
If the time of multiple servers needs to be fully synchronized, it is best to configure a unified automatic synchronization task for these
Today, the boss asked me to install linux NTP service on our management machine, the platform is ARM9. the operating system is linux-2.4. I found the NTP source code on the Internet. After compilation, I copied ntpd, ntpq, ntpdate, and some files to the management machine. The NTP. conf configuration file is configured as follows:
Restrict default nomodify
Se
These 3 kinds of vulnerability conventional reinforcement to the corresponding operating system to the official vulnerability upgrade package. Now that's the case, the following is unconventional:OPENSSH:To change the SSH version:Whereis ssh//view SSH directoryCD to this directoryCP SSH Ssh.bak//backup SSHSsh-v//view SSH versionSed-i ' s/openssh_6.9p1/openssh_7.2p2/g ' SSH//modified version, previous to current version, back to latest versionSSH-V//Check the revised versionTelnet 127.0.0.1 22//v
Centos uses ntp to maintain time synchronization 01www.2cto.com # Install and start ntp02yuminstallntp03chkconfigntpdon04ntpdatepool. ntp. org05servicentpdstart0607 # Modify the time zone www.2cto. com08ln-s/usr/share /... centos uses ntp to maintain time synchronization 01 www.2cto.com # install and start ntp02yum install ntp03chkconfig ntpd on04ntpdate pool.
Machine Networking:If the server can be networked: Perform ntpdate 1.cn.pool.ntp.org the server will automatically synchronize time write a scheduled task to perform a time synchronization every two minutes;Crontab-e/2 */usr/sbin/ntpdate 1.cn.pool.ntp.org//So that time synchronization can be achievedThe following is a domestic NTP Server1.cn.pool.ntp.org2.cn.pool.ntp.org3.cn.pool.ntp.org0.cn.pool.ntp.orgcn.pool.ntp.orgtw.pool.ntp.org0.tw.pool.ntp.org
Linux Synchronizes time from NTP in Windows-Linux Enterprise Application-Linux server application information. The following is a detailed description. I have just started linux, so I don't know much about it in many places. At the beginning, I encountered a problem-time synchronization.
So I searched related articles online, sorted out the ideas, and shared them!
= The following line is the body:
First, we need a win system machine as the
SYN2136 type Beidou NTP network time serverProduct OverviewSYN2136-type Beidou NTP network time server is designed by Xi ' an synchronous Electronic Technology Co., Ltd., self-developed and produced a time server based on the NTP/SNTP protocol, receive Beidou satellite signal, from the Beidou Earth geostationary satellites to obtain standard clock signal informat
About NTPNTP ( networktime Protocol UTC 0.1ms In most places on the Internet its accuracy can be achieved 1-50ms . NTP The server is using NTP the protocol provides time synchronization services. NTP Server InstallationView system comes with NTP[Email protected] ~]# Rpm-qa ntpntp-4.2.6p5-5.el6.centos.x86_64If
Configuring NTP to set up the local time server NTP is a protocol used to keep the system and a precise time source at time. in Linux, we can use the Network Time Protocol to keep our system accurate. install: # Yum install NTP or find the ntp rpm package from the installation disk. when you only have one server that c
quickly build NTP time synchronization server under LinuxBackground:server more, time consistency and readiness is particularly important, although this problem is always ignored, but the unification of time is very necessary, because the time problem caused by service problems is also commonplace, this article briefly introduce the rapid construction and use of NTP. 1. Installing NTPYum-y Install
turn from: http://hi.baidu.com/uc100200/blog/item/cccef6b517b512de37d3ca02.html
a
, BackgroundThe machine is loaded with BusyBox, using the smallest set of Linux. The hardware clock is local time, the kernel clock is UTC time, no time zone is set, and there is no option for any time zone setting.
Second, demandThis machine needs to be timed for NTP time synchronization. local time is displayed to the user after synchronization.
third, the proc
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