电子发烧友App
一、使用 NTP 服务时间同步
安装 ntp
[root@node ~]# yum -y install ntp
启动 ntp 服务
[root@node ~]# systemctl start ntpd [root@node ~]# systemctl enable ntpd Created symlink from /etc/systemd/system/multi-user.target.wants/ntpd.service to /usr/lib/systemd/system/ntpd.service.
查看 ntp 服务
[root@node ~]# systemctl status ntpd ● ntpd.service - Network Time Service Loaded: loaded (/usr/lib/systemd/system/ntpd.service; enabled; vendor preset: disabled) Active: active (running) since Thu 2022-08-04 0847 CST; 7h left Main PID: 20746 (ntpd) Tasks: 1 Memory: 768.0K CGroup: /system.slice/ntpd.service └─20746 /usr/sbin/ntpd -u ntp:ntp -g Aug 04 0847 node ntpd[20746]: Listen normally on 6 lo ::1 UDP 123 Aug 04 0847 node ntpd[20746]: Listen normally on 7 ens33 fe80:72979934 UDP 123 Aug 04 0847 node ntpd[20746]: Listening on routing socket on fd #24 for interface updates Aug 04 0847 node systemd[1]: Started Network Time Service. Aug 04 0847 node ntpd[20746]: 0.0.0.0 c016 06 restart Aug 04 0847 node ntpd[20746]: 0.0.0.0 c012 02 freq_set kernel 0.000 PPM Aug 04 0847 node ntpd[20746]: 0.0.0.0 c011 01 freq_not_set Aug 04 0856 node ntpd[20746]: 0.0.0.0 c61c 0c clock_step -28798.353463 s Aug 04 0057 node ntpd[20746]: 0.0.0.0 c614 04 freq_mode Aug 04 0058 node ntpd[20746]: 0.0.0.0 c618 08 no_sys_peer
修改 ntp.conf 文件
[root@node ~]# vim /etc/ntp.conf [root@node ~]# grep server /etc/ntp.conf # Use public servers from the pool.ntp.org project. #server 0.centos.pool.ntp.org iburst server ntp.aliyun.com iburst #broadcast 192.168.1.255 autokey # broadcast server #broadcast 224.0.1.1 autokey # multicast server #manycastserver 239.255.254.254 # manycast server
重启服务
[root@node ~]# systemctl restart ntpd
检查同步状态
[root@node ~]# ntpq -p remote refid st t when poll reach delay offset jitter ============================================================================== 203.107.6.88 100.107.25.114 2 u 2 64 1 30.975 149.499 0.393
二、使用 ntpdate 同步
使用 ntpd 命令同步
[root@node ~]# ntpdate ntp.aliyun.com 4 Aug 0017 ntpdate[20924]: adjust time server 203.107.6.88 offset -0.001543 sec
查看时间
[root@node ~]# date Thu Aug 4 0046 CST 2022
三、处理 ntpdate 同步失败报错处理方法
报错信息
cna02:~ # ntpdate ntp1.aliyun.com 4 Aug 0741 ntpdate[18694]: the NTP socket is in use, exiting
处理方法
cna02:~ # service ntpd stop Redirecting to /bin/systemctl stop ntpd.service
重新同步
cna02:~ # ntpdate ntp1.aliyun.com 3 Aug 2336 ntpdate[28980]: step time server 120.25.115.20 offset -28911.609110 sec
查看时间是否正确
cna02:~ # date Wed Aug 3 2341 CST 2022
四、使用 chrony 服务时间同步
安装 chrony
[root@node ~]# yum -y install chrony Loaded plugins: fastestmirror, langpacks Loading mirror speeds from cached hostfile * base: mirrors.bfsu.edu.cn * extras: mirrors.bfsu.edu.cn * updates: mirrors.bfsu.edu.cn Resolving Dependencies --> Running transaction check ---> Package chrony.x86_64 0:3.2-2.el7 will be updated ---> Package chrony.x86_64 0:3.4-1.el7 will be an update --> Finished Dependency Resolution Dependencies Resolved =============================================================================================================================================================================== Package Arch Version Repository Size =============================================================================================================================================================================== Updating: chrony x86_64 3.4-1.el7 base 251 k Transaction Summary =============================================================================================================================================================================== Upgrade 1 Package Total download size: 251 k Downloading packages: No Presto metadata available for base chrony-3.4-1.el7.x86_64.rpm | 251 kB 0000 Running transaction check Running transaction test Transaction test succeeded Running transaction Updating : chrony-3.4-1.el7.x86_64 1/2 Cleanup : chrony-3.2-2.el7.x86_64 2/2 Verifying : chrony-3.4-1.el7.x86_64 1/2 Verifying : chrony-3.2-2.el7.x86_64 2/2 Updated: chrony.x86_64 0:3.4-1.el7 Complete!
启动 chrony 服务
[root@node ~]# systemctl enable --now chronyd Created symlink from /etc/systemd/system/multi-user.target.wants/chronyd.service to /usr/lib/systemd/system/chronyd.service.
查看 chrony 状态
[root@node ~]# systemctl status chronyd ● chronyd.service - NTP client/server Loaded: loaded (/usr/lib/systemd/system/chronyd.service; enabled; vendor preset: enabled) Active: active (running) since Thu 2022-08-04 0027 CST; 29s ago Docs: man:chronyd(8) man:chrony.conf(5) Process: 21136 ExecStartPost=/usr/libexec/chrony-helper update-daemon (code=exited, status=0/SUCCESS) Process: 21132 ExecStart=/usr/sbin/chronyd $OPTIONS (code=exited, status=0/SUCCESS) Main PID: 21134 (chronyd) Tasks: 1 Memory: 364.0K CGroup: /system.slice/chronyd.service └─21134 /usr/sbin/chronyd Aug 04 0027 node systemd[1]: Starting NTP client/server... Aug 04 0027 node chronyd[21134]: chronyd version 3.4 starting (+CMDMON +NTP +REFCLOCK +RTC +PRIVDROP +SCFILTER +SIGND +ASYNCDNS +SECHASH +IPV6 +DEBUG) Aug 04 0027 node systemd[1]: Started NTP client/server. Aug 04 0035 node chronyd[21134]: Selected source 193.182.111.141 Aug 04 0035 node chronyd[21134]: Source 78.46.102.180 replaced with 94.237.64.20
修改配置文件
[root@node ~]# grep server /etc/chrony.conf # Use public servers from the pool.ntp.org project. #server 0.centos.pool.ntp.org iburst #server 1.centos.pool.ntp.org iburst #server 3.centos.pool.ntp.org iburst server ntp1.aliyun.com iburst
重启服务
[root@node ~]# systemctl restart chronyd
检查时间同步状态
[root@node ~]# chronyc sources 210 Number of sources = 1 MS Name/IP address Stratum Poll Reach LastRx Last sample =============================================================================== ^* 120.25.115.20 2 6 71 26 +751us[+1549us] +/- 19ms
五、手动修改时间
修改时间方法 1
[root@node ~]# date -s "2012-05-23 0101" Wed May 23 0101 CST 2012 [root@node ~]# date Wed May 23 0105 CST 2012
修改时间方法 2
修改时间顺序为月日时分年. 秒
[root@tianyi ~]# date 090621282021.28 Mon Sep 6 2128 CST 2021
硬件时间向系统时间同步
[root@node ~]# hwclock -w
按格式输出时间
[root@node ~]# date "+%Y-%m-%d %H:%M:%S" 2012-05-23 0110
设置时区
[root@tianyi backups]# timedatectl list-timezones |grep Shanghai Asia/Shanghai [root@tianyi backups]# timedatectl set-timezone Asia/Shanghai编辑：黄飞
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