yum install ntp 报错：Error: Package: ntp-4.2.6p5-25.el7.centos.2.x86_64 (base)

redhat7 在安装ntp时报如下错误

Error: Package: ntp-4.2.6p5-25.el7.centos.2.x86_64 (base)
Requires: ntpdate = 4.2.6p5-25.el7.centos.2
Installed: ntpdate-4.2.6p5-25.el7_3.2.x86_64 (@anaconda/7.4)
ntpdate = 4.2.6p5-25.el7_3.2
Available: ntpdate-4.2.6p5-25.el7.centos.2.x86_64 (base)
ntpdate = 4.2.6p5-25.el7.centos.2
You could try using --skip-broken to work around the problem
** Found 1 pre-existing rpmdb problem(s), 'yum check' output follows:
rhn-check-2.0.2-17.el7.noarch has missing requires of yum-rhn-plugin >= ('0', '1.6.4', '1')

 

解决：

yum clean all

yum distro-sync

yum update