centos 7.3 设置静态IP或ping 报name or service not known

首先把虚拟机配置为桥接模式，然后开启
再你打算修改虚拟机IP之前首先ping下127.0.0.1看看网卡是否是好的（如果127.0.0.1都ping不通的话，那网卡就是坏的了…）

[root@localhost /]# ping 127.0.0.1PING 127.0.0.1 (127.0.0.1) 56(84) bytes of data.64 bytes from 127.0.0.1: icmp_seq=1 ttl=64 time=0.106 ms64 bytes from 127.0.0.1: icmp_seq=2 ttl=64 time=0.095 ms64 bytes from 127.0.0.1: icmp_seq=3 ttl=64 time=0.097 ms64 bytes from 127.0.0.1: icmp_seq=4 ttl=64 time=0.073 ms64 bytes from 127.0.0.1: icmp_seq=5 ttl=64 time=0.058 ms64 bytes from 127.0.0.1: icmp_seq=6 ttl=64 time=0.097 ms64 bytes from 127.0.0.1: icmp_seq=7 ttl=64 time=0.375 ms^C64 bytes from 127.0.0.1: icmp_seq=8 ttl=64 time=0.733 ms64 bytes from 127.0.0.1: icmp_seq=9 ttl=64 time=0.095 ms64 bytes from 127.0.0.1: icmp_seq=10 ttl=64 time=0.102 ms^C--- 127.0.0.1 ping statistics ---10 packets transmitted, 10 received, 0% packet loss, time 9006msrtt min/avg/max/mdev = 0.058/0.183/0.733/0.202 ms[root@localhost /]# 

在设置静态IP之前可以先看下自己当前开启的网卡：

[root@localhost /]# ifconfigens32: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500        inet 192.168.0.121  netmask 255.255.255.0  broadcast 192.168.0.255        inet6 fe80::9474:4a7c:66fd:8d90  prefixlen 64  scopeid 0x20<link>        ether 00:0c:29:e5:c1:96  txqueuelen 1000  (Ethernet)        RX packets 4436  bytes 372786 (364.0 KiB)        RX errors 0  dropped 0  overruns 0  frame 0        TX packets 871  bytes 147085 (143.6 KiB)        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536        inet 127.0.0.1  netmask 255.0.0.0        inet6 ::1  prefixlen 128  scopeid 0x10<host>        loop  txqueuelen 1  (Local Loopback)        RX packets 16  bytes 1320 (1.2 KiB)        RX errors 0  dropped 0  overruns 0  frame 0        TX packets 16  bytes 1320 (1.2 KiB)        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0[root@localhost /]# 

1.设置网卡ens32静态IP

[root@localhost /]# cd /etc/sysconfig/network-scripts/        #注意点cd与“/etc”之间的空格[root@localhost network-scripts]# [root@localhost network-scripts]# ls     #查看network-scripts下的所有文件ifcfg-ens32  ifdown-eth   ifdown-isdn    ifdown-sit       ifup          ifup-ib    ifup-plip   ifup-routes    ifup-tunnel        network-functions-ipv6ifcfg-lo     ifdown-ib    ifdown-post    ifdown-Team      ifup-aliases  ifup-ippp  ifup-plusb  ifup-sit       ifup-wirelessifdown       ifdown-ippp  ifdown-ppp     ifdown-TeamPort  ifup-bnep     ifup-ipv6  ifup-post   ifup-Team      init.ipv6-globalifdown-bnep  ifdown-ipv6  ifdown-routes  ifdown-tunnel    ifup-eth      ifup-isdn  ifup-ppp    ifup-TeamPort  network-functions[root@localhost network-scripts]# 使用vi进行编辑[root@localhost network-scripts]# vi ifcfg-ens32【点击i 进行插入  完成之后Esc 并输入:wq 进行保存】[root@localhost network-scripts]# vi ifcfg-ens32TYPE="Ethernet"BOOTPROTO="static"  #启用静态IP地址DEFROUTE="yes"PEERDNS="yes"PEERROUTES="yes"IPV4_FAILURE_FATAL="no"IPV6INIT="yes"IPV6_AUTOCONF="yes"IPV6_DEFROUTE="yes"IPV6_PEERDNS="yes"IPV6_PEERROUTES="yes"IPV6_FAILURE_FATAL="no"IPV6_ADDR_GEN_MODE="stable-privacy"NAME="ens32"UUID="17e371b3-5107-4d72-a58f-e8f71396fd68"DEVICE="ens32"ONBOOT="yes"IPADDR=“192.168.0.121”GATEWAY=“192.168.0.1”修改：BOOTPROTO=“static”  #启用静态IP地址加入个：IPADDR=“192.168.0.121”  #设置IP地址GATEWAY=“192.168.0.1”  #设置网关

【注意】设置好后保存！

然后重启网络吧：

[root@localhost ~]# service network restart    #重启网络Restarting network (via systemctl):                        [  OK  ][root@localhost ~]# [root@localhost ~]# ping 192.168.0.107  #ping局域网内的IP正常PING 192.168.0.107 (192.168.0.107) 56(84) bytes of data.64 bytes from 192.168.0.107: icmp_seq=1 ttl=64 time=0.759 ms64 bytes from 192.168.0.107: icmp_seq=2 ttl=64 time=1.07 ms64 bytes from 192.168.0.107: icmp_seq=3 ttl=64 time=0.615 ms^C--- 192.168.0.107 ping statistics ---3 packets transmitted, 3 received, 0% packet loss, time 2004msrtt min/avg/max/mdev = 0.615/0.816/1.076/0.195 ms[root@localhost ~]# ping www.baidu.com    #ping百度域名还是不行ping: www.baidu.com: Name or service not known  #出现这个错误

“ping: www.baidu.com: Name or service not known”错误解决办法

第一步查看ONBOOT：

[root@localhost ~]# cd /etc/sysconfig/network-scripts/[root@localhost network-scripts]# lsifcfg-ens32  ifdown-bnep  ifdown-ippp  ifdown-post    ifdown-sit       ifdown-tunnel  ifup-bnep  ifup-ippp  ifup-plip   ifup-ppp     ifup-Team      ifup-wireless      network-functions-ipv6ifcfg-lo     ifdown-eth   ifdown-ipv6  ifdown-ppp     ifdown-Team      ifup           ifup-eth   ifup-ipv6  ifup-plusb  ifup-routes  ifup-TeamPort  init.ipv6-globalifdown       ifdown-ib    ifdown-isdn  ifdown-routes  ifdown-TeamPort  ifup-aliases   ifup-ib    ifup-isdn  ifup-post   ifup-sit     ifup-tunnel    network-functions[root@localhost network-scripts]# vi ifcfg-ens32TYPE="Ethernet"BOOTPROTO="static"  #启用静态IP地址DEFROUTE="yes"PEERDNS="yes"PEERROUTES="yes"IPV4_FAILURE_FATAL="no"IPV6INIT="yes"IPV6_AUTOCONF="yes"IPV6_DEFROUTE="yes"IPV6_PEERDNS="yes"IPV6_PEERROUTES="yes"IPV6_FAILURE_FATAL="no"IPV6_ADDR_GEN_MODE="stable-privacy"NAME="ens32"UUID="17e371b3-5107-4d72-a58f-e8f71396fd68"DEVICE="ens32"ONBOOT="yes"IPADDR=“192.168.0.121”GATEWAY=“192.168.0.1”

发现ONBOOT=”no”已设置为ONBOOT=”yes”

第二步查看：
ping 命令是属于ICMP协议，ping ip地址有效。若直接ping网址（域名），需要配置DNS。编辑添加nameserver如下：

vi /etc/resolv.conf nameserver 8.8.8.8 nameserver 8.8.4.4

【注意】设置完保存！

再ping[root@localhost /]# ping www.baidu.comPING www.a.shifen.com (61.135.169.121) 56(84) bytes of data.64 bytes from 61.135.169.121 (61.135.169.121): icmp_seq=1 ttl=55 time=16.9 ms64 bytes from 61.135.169.121 (61.135.169.121): icmp_seq=2 ttl=55 time=25.6 ms64 bytes from 61.135.169.121 (61.135.169.121): icmp_seq=3 ttl=55 time=21.6 ms64 bytes from 61.135.169.121 (61.135.169.121): icmp_seq=4 ttl=55 time=17.2 ms64 bytes from 61.135.169.121 (61.135.169.121): icmp_seq=5 ttl=55 time=22.0 ms^C--- www.a.shifen.com ping statistics ---5 packets transmitted, 5 received, 0% packet loss, time 4010msrtt min/avg/max/mdev = 16.901/20.716/25.652/3.277 ms[root@localhost /]# 到这里就解决了！