centos7安装nslookup工具、ntp工具

yum install bind-utils -y

# .检测[root@node2 ~]# nslookup localhostServer: 118.118.118.9Address: Non-authoritative answer:Name: localhost.openstacklocalAddress: 183.136.168.91# .搭建DNSyum -y install dnsmasqcp /etc/resolv.conf{,.bak}rm -rf /etc/resolv.confecho -e "nameserver 127.0.0.1\nnameserver $(hostname -i)" >> /etc/resolv.confchmod /etc/resolv.confchattr +i /etc/resolv.confecho -e "server=8.8.8.8\nserver=8.8.4.4" > /etc/dnsmasq.confecho -e "$(hostname -i)\tlocalhost.$(hostname -d)" >> /etc/hostsservice dnsmasq restart# .再次检测[root@master ~]# nslookup localhostServer: 127.0.0.1Address: Name: localhostAddress: 192.168.1.78

yum -y install ntp

ntpdate .centos.pool.ntp.org