centos ntp服务配置文件解析

1./etc/ntp

[root@gdgz-htjf-kvc01-1 ntp]# cat /etc/ntp.conf|grep ^# -v

restrict default kod nomodify notrap nopeer noquery

restrict 127.0.0.1

server 0.centos.pool.ntp.org

server 1.centos.pool.ntp.org

server 2.centos.pool.ntp.org

fudge 127.127.1.0 stratum 10

driftfile /var/lib/ntp/drift

keys /etc/ntp/keys

restrict 0.centos.pool.ntp.org mask 255.255.255.255 nomodify notrap noquery

restrict 1.centos.pool.ntp.org mask 255.255.255.255 nomodify notrap noquery

restrict 2.centos.pool.ntp.org mask 255.255.255.255 nomodify notrap noquery

Restrict ---------指定可以进行NTP通信的IP地址或网段

Server -----------指定时间校对的NTP服务器，优先级从上到下。

fudge --------

driftfile ---------和上层NTP服务器的频率误差记录在此文件

logfile -----------指定NTP服务日志文件

broadcast ---------指定NTP服务的网段

2./etc/ntp/step-tickers

[root@gdgz-htjf-kvc01-1 ntp]# cat /etc/ntp/step-tickers

0.centos.pool.ntp.org

1.centos.pool.ntp.org

2.centos.pool.ntp.org

当NTP服务启动会自动和此文件记录的NTP服务器进行时间校对

3./etc/sysconfig/ntpd

[root@gdgz-htjf-kvc01-1 ntp]# cat /etc/sysconfig/ntpd

# Drop root to id 'ntp:ntp' by default.

OPTIONS="-u ntp:ntp -p /var/run/ntpd.pid"

# Set to 'yes' to sync hw clock after successful ntpdate

SYNC_HWCLOCK=no

# Additional options for ntpdate

NTPDATE_OPTIONS=""

4.其他命令

ntpstat 显示NTP服务器的相关状态

ntpq -------启动标准的NTP查询

ntpdate ---------指定立即进行校对的时间服务器

NTP 服务时间

133.100.11.8 prefer

210.72.145.44

203.117.180.36

131.107.1.10

time.asia.apple.com
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