Linux Time synchronization Ntpdate

Linux servers require time accuracy, but Linux itself does not have the network time synchronization function, we need to use the Ntpdate function to achieve accurate time.

Installing Ntpdate

Yum-y Install Ntpdate

domestic commonly used NTP server list #ntp. sjtu.edu.cn 202.120.2.101 (Shanghai Jiaotong University Network Center NTP server address) #s1a. time.edu.cn Posts and Telecommunications #s1b.time.edu.cn Tsinghua University #s1c.time.edu.cn #s1d.time.edu.cn Southeast University #s1e.time.edu.cn Tsinghua #s2a.time.edu.cn Tsinghua University #s2b.time.edu.cn Tsinghua University s2c.time.edu.cn #s2d.time.edu.cn Southwest Network Center #s2e.time.edu.cn Northwest Network Center #s2f.time.edu.cn Northeast Area Network Center #s2g.time.edu.cn East China South Regional Network Center #s2h.time.edu.cn Sichuan University Network Management Center #s2j.time.edu.cn Dalian University of Network Center #s2k.time.edu.cn cernet Guilin main node #s2m.time.edu.cn The synchronization commands are as follows (Shanghai Jiaotong University)Ntpdate ntp.sjtu.edu.cn can also be set in this command to schedule tasks crontab-e00 * * * Root ntpdate ntp.sjtu.edu.cn 11 points per day sync