错误信息：
Running rpm_check_debug
ERROR with rpm_check_debug vs depsolve:
libc.so.6(GLIBC_2.14)(64bit) is needed by libgssglue-0.4-2.el7.nux.x86_64
You could try running: rpm -Va --nofiles --nodigest
Your transaction was saved, rerun it with:
yum load-transaction /tmp/yum_save_tx-2018-02-06-09-30GrY1gL.yumtx
解决方法：
删除/etc/yum.repos.d 下的repos源， 重新下载阿里云的 yum源和 epel源 ， yum clean all ,yum makecache
重新 yum install 成功安装
Installed:
nfs-utils.x86_64 1:1.2.3-75.el6_9 rpcbind.x86_64 0:0.2.0-13.el6_9.1
Dependency Installed:
keyutils.x86_64 0:1.4-5.el6 libevent.x86_64 0:1.4.13-4.el6 libgssglue.x86_64 0:0.1-11.el6 libtirpc.x86_64 0:0.2.1-13.el6_9
nfs-utils-lib.x86_64 0:1.1.5-13.el6 python-argparse.noarch 0:1.2.1-2.1.el6
Complete!