linux时钟同步
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# 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 server 192.168.132.68
34、linux时钟同步
需要root执行以下命令：
1、配置时钟同步信息 server 192.168.132.68 表示从192.168.132.68同 步时钟
vi /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).
# multicast client
#manycastserver 239.255.254.254
# manycast server
#manycastclient 239.255.254.254 autokey # manycast client
# Enable public key cryptography. #crypto
# 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
# 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. disable monitor
#broadcast 192.168.1.255 autokey
# broadcast server
#broadcastclient
# broadcast client
#broadcast 224.0.1.1 autokey
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# multicast server
#multicastclient 224.0.1.1
# 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
includefile /etc/ntp/crypto/pw
# Key file containing the keys and key identifiers used when operating # with symmetric key cryptography. keys /etc/ntp/keys
2、查看是否安装了时钟同步服务，若未安装，则执行命令安装服务。如果安装失 败，需要下载对应版本rpm包手工安装
yum install -y ntp
3、启动时钟同步服务
service ntpd start
4、查看同步服务
service ntpd status
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