- 步骤精简：
- 1.确认系统是否已安装NTP服务
- rpm -qa | grep ntp
- 2.vim /etc/ntp.conf 分别配置NTP服务端和客户端配置信息，具体配置见如下文。
- 3.systemctl status ntpd.service 验证所有服务器的ntp服务启动状态，只有NTP服务端才需要启动NTP服务，其余NTP客户端均需要关闭这个NTP服务（systemctl stop ntpd.service）
- 4.systemctl enable ntpdate.service 设置ntpdate 时间同步服务开机自启动
- 5.date 查看下本机当前系统时间
- 6.ntpdate xxx 同步一下NTP服务端服务器的系统时间
- 7.date 再次查看本机当前系统时间，看一下同步是否成功
- 1.确认系统是否已安装NTP服务
- 1.环境准备(347条消息) Linux服务器ntp时间同步离线安装配置_software_student的博客-CSDN博客
- 确定一台ntp服务端，剩下的服务器均为NTP客户端。
- 在NTP服务端服务器上安装NTP服务和NTPdate服务
- 将所有NTP客户端服务器的/etc/ntp.conf配置文件中的上游时间配置为NTP服务端服务器的ip地址，通过修改NTP服务端 的系统时间，以其为基准，来控制整个集群的服务器系统时间
- 2.下载安装包
- 确认操作系统版本，可执行以下命令确认自己系统的版本信息（我的Linux系统为CentOS7.4 x86_64版本）
- cat /etc/redhat-releaseuname -acat /proc/version
- uname -a
- cat /proc/version
- 确认系统是否已安装NTP服务
- rpm -qa | grep ntp
- 如果系统自带或已安装版本不符合个人需求，可进行卸载，命令如下：
- rpm -e –nodeps ntpdate-4.2.6p5-29.el7.centos.2.x86_64
- rpm -e –nodeps ntp-4.2.6p5-29.el7.centos.2.x86_64
- 3.安装NTP服务
- 下载完成所需安装包，接下来就进行NTP服务的安装
- 安装ntpdate
- rpm -ivh ntpdate-4.2.6p5-29.el7.centos.2.x86_64.rpm
- 4.配置NTP
- NTP服务器端配置
- vim /etc/ntp.conf
- # For more information about this file, see the man pages
- # ntp.conf(5), ntp_acc(5), ntp_auth(5), ntp_clock(5), ntp_misc(5), ntp_mon(5).
- driftfile /var/lib/ntp/drift
- # Permit time synchronization with our time source, but do not
- # permit the source to query or modify the service on this system.
- restrict default nomodify notrap nopeer noquery
- # Permit all access over the loopback interface. This could
- # be tightened as well, but to do so would effect some of
- # the administrative functions.
- restrict 127.0.0.1
- restrict ::1
- # Hosts on local network are less restricted.
- #restrict 192.168.1.0 mask 255.255.255.0 nomodify notrap
- # 允许172.16.54.0网段内所有机器从esnode1同步时间
- restrict 172.16.54.0 mask 255.255.255.0 nomodify notrap
- # Use public servers from the pool.ntp.org project.
- # Please consider joining the pool (http://www.pool.ntp.org/join.html).
- #server 0.centos.pool.ntp.org iburst
- #server 1.centos.pool.ntp.org iburst
- #server 2.centos.pool.ntp.org iburst
- #server 3.centos.pool.ntp.org iburst
- # 中国国家授时中心服务器地址
- server 0.cn.pool.ntp.org
- server 1.cn.pool.ntp.org
- server 2.cn.pool.ntp.org
- server 3.cn.pool.ntp.org
- # 允许上层时间服务器主动修改本机时间
- restrict 0.cn.pool.ntp.org nomodify notrap noquery
- restrict 1.cn.pool.ntp.org nomodify notrap noquery
- restrict 2.cn.pool.ntp.org nomodify notrap noquery
- restrict 3.cn.pool.ntp.org nomodify notrap noquery
- # 外部时间服务器不可用时，以本地时间作为时间服务
- server 127.127.1.0
- fudge 127.127.1.0 stratum 10
- #broadcast 192.168.1.255 autokey # broadcast server
-
- #broadcastclient # broadcast client
- #broadcast 224.0.1.1 autokey # multicast server
- #multicastclient 224.0.1.1 # multicast client
- #manycastserver 239.255.254.254 # manycast server
-
- #broadcast 192.168.1.255 autokey # broadcast server
- #manycastclient 239.255.254.254 autokey # manycast client
- # Enable public key cryptography.
- #crypto
- includefile /etc/ntp/crypto/pw
- # Key file containing the keys and key identifiers used when operating
- # with symmetric key cryptography.
- keys /etc/ntp/keys
- # Specify the key identifiers which are trusted.
- #trustedkey 4 8 42
- # Specify the key identifier to use with the ntpdc utility.
- #requestkey 8
- # Specify the key identifier to use with the ntpq utility.
- #controlkey 8
- # Enable writing of statistics records.
- #statistics clockstats cryptostats loopstats peerstats
- # Disable the monitoring facility to prevent amplification attacks using ntpdc
- # monlist command when default restrict does not include the noquery flag. See
- # CVE-2013-5211 for more details.
- # Note: Monitoring will not be disabled with the limited restriction flag.
- SYNC_HWCLOCK=yes
- disable monitor
- NTP客户端配置
- # For more information about this file, see the man pages
- # ntp.conf(5), ntp_acc(5), ntp_auth(5), ntp_clock(5), ntp_misc(5), ntp_mon(5).
- driftfile /var/lib/ntp/drift
- # Permit time synchronization with our time source, but do not
- # permit the source to query or modify the service on this system.
- restrict default nomodify notrap nopeer noquery
- # Permit all access over the loopback interface. This could
- # be tightened as well, but to do so would effect some of
- # the administrative functions.
- restrict 127.0.0.1
- restrict ::1
- # Hosts on local network are less restricted.
- #restrict 192.168.1.0 mask 255.255.255.0 nomodify notrap
- # Use public servers from the pool.ntp.org project.
- # Please consider joining the pool (http://www.pool.ntp.org/join.html).
- #server 0.centos.pool.ntp.org iburst
- #server 1.centos.pool.ntp.org iburst
- #server 2.centos.pool.ntp.org iburst
- #server 3.centos.pool.ntp.org iburst
- # 从esnode1中同步时间
- server 172.16.54.22
- # 允许esnode1修改本地时间
- restrict 172.16.54.22 nomodify notrap noquery
- # 如果esnode1不可用，用本地的时间服务
- server 127.127.1.0
- fudge 127.127.1.0 stratum 10
- #broadcast 192.168.1.255 autokey # broadcast server
-
- #broadcastclient # broadcast client
- #broadcast 224.0.1.1 autokey # multicast server
- #multicastclient 224.0.1.1 # multicast client
- #manycastserver 239.255.254.254 # manycast server
-
- #broadcast 192.168.1.255 autokey # broadcast server
- #manycastclient 239.255.254.254 autokey # manycast client
- # Enable public key cryptography.
- #crypto
- includefile /etc/ntp/crypto/pw
- # Key file containing the keys and key identifiers used when operating
- # with symmetric key cryptography.
- keys /etc/ntp/keys
- # Specify the key identifiers which are trusted.
- #trustedkey 4 8 42
- # Specify the key identifier to use with the ntpdc utility.
- #requestkey 8
- # Specify the key identifier to use with the ntpq utility.
- #controlkey 8
- # Enable writing of statistics records.
- #statistics clockstats cryptostats loopstats peerstats
- # Disable the monitoring facility to prevent amplification attacks using ntpdc
- # monlist command when default restrict does not include the noquery flag. See
- # CVE-2013-5211 for more details.
- # Note: Monitoring will not be disabled with the limited restriction flag.
- SYNC_HWCLOCK=yes
- disable monitor
- 5.验证时间同步
- 启动ntp服务端的NTP服务
- systemctl start ntpd.service
- 查看启动运行状态
- systemctl status ntpd.service
- ntpstat
- 在其他客户端服务器上尝试着同步NTP服务端服务器的系统时间
- ntpdate xxx
- 每个节点开启开机自启动
- systemctl enable ntpdate.service
- linux修改系统时间
- 一、查看和修改Linux的时区1. 查看当前时区
- 命令 ： “date -R”
- 1.修改设置Linux服务器时区方法 A
- 命令 ： “tzselect”
- 依据引导进行选择
- 二、查看和修改Linux的时间1. 查看时间和日期
- 命令 ： “date”
- 如果时间不对，可以自己手动调整时间
- 例如：将系统日期设定成2009年11月3日的命令
- 命令 ： “date -s 11/03/2009”
- 将系统时间设定成下午5点55分55秒的命令
- 命令 ： “date -s 17:55:55”
- 3. 将当前时间和日期写入BIOS，避免重启后失效
- 命令 ： “hwclock -w”
- ————————————————
- 版权声明：本文为CSDN博主「MrLixinglin」的原创文章，遵循CC 4.0 BY-SA版权协议，转载请附上原文出处链接及本声明。
- 原文链接：https://blog.csdn.net/lixld/article/details/88060836
- 查看当前系统时间
- date
作者 admin
张宴银，大数据开发工程师