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