ntpd --v 查看当前ntp版本
yum -y install gcc libcap libcap-devel glibc-devel
tar -xvf ntp-4.2.8p13.tar.gz
cd ntp-4.2.8p13
./configure --prefix=/usr --bindir=/usr/sbin --sysconfdir=/etc --enable-linuxcaps --with-lineeditlibs=readline --enable-all-clocks --enable-parse-clocks --enable-clockctl
make && make install
