在linux下搭建NTP服务器

最近搭建了NTP时间服务器，下面就将整个过程记录下来，为他人也为自己，即使很简单。

具体步骤：1，下载NTP时间服务器的.tar.gz包到linux下，解压到自己喜欢的目录

                       2，直接./configure,然后make

                       3，这样在众多文件夹里面就有叫/ntpd和/ntpq、/ntpdate的文件夹了，这里面就有编译生成的命令了，可以拿来直接使用的。很多人觉得要make install，我个人觉得没必要。

                       4，简单的NTP服务器需要，一个ntpd指令，一个ntp.conf配置文件，再一个ntpq指令就够了，如果想做客户端的话当然得要用ntpdate指令了。

                       5，配置文件要考在/etc/ntp.conf，如果做服务器这里的配置文件可以这么写，见底部。

      遇到的问题：两台linux之间，有时#./ntpd 后，#ps -e 可以看到该进程，但是客户端就是连不上，虽然可以ping通，最后发现果然和google上说的一样，要注意时间，有的NTP服务器要一个小时才能正常工作(鸟哥说的)，所以如果你的服务器还是不好使，不妨等上一会，然后在试。

我的配置文件：

# 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

restrict -6 default  nomodify

# 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 -6 ::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.fedora.pool.ntp.org iburst

#server 1.fedora.pool.ntp.org iburst

#server 2.fedora.pool.ntp.org iburst

#server 3.fedora.pool.ntp.org iburst

#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

#manycastclient 239.255.254.254 autokey # manycast client

# Undisciplined Local Clock. This is a fake driver intended for backup

# and when no outside source of synchronized time is available. 

server 127.127.1.0 # local clock

fudge 127.127.1.0 stratum 10 

# 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