先找到配置文件：
[root@localhost bin]# cd /etc/sysconfig/network-scripts [root@localhost network-scripts]# ls ifcfg-eno16777736 ifdown-ppp ifup-ib ifup-Team ifcfg-lo ifdown-routes ifup-ippp ifup-TeamPort ifdown ifdown-sit ifup-ipv6 ifup-tunnel ifdown-bnep ifdown-Team ifup-isdn ifup-wireless ifdown-eth ifdown-TeamPort ifup-plip init.ipv6-global ifdown-ib ifdown-tunnel ifup-plusb network-functions ifdown-ippp ifup ifup-post network-functions-ipv6 ifdown-ipv6 ifup-aliases ifup-ppp ifdown-isdn ifup-bnep ifup-routes ifdown-post ifup-eth ifup-sit [root@localhost network-scripts]# gedit ifcfg-eno16777736
开始配置是：
TYPE="Ethernet" BOOTPROTO="dhcp" 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" NAME="eno16777736" UUID="157c8fb5-23b3-414c-8519-25bef9b20a54" DEVICE="eno16777736" ONBOOT="yes"
修改成：
TYPE="Ethernet" #BOOTPROTO="dhcp" 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" NAME="eno16777736" UUID="157c8fb5-23b3-414c-8519-25bef9b20a54" DEVICE="eno16777736" #ONBOOT="yes" #static assignment NM_CONTROLLED=no #表示该接口将通过该配置文件进行设置，而不是通过网络管理器进行管理 ONBOOT=yes #开机启动 BOOTPROTO=static #静态IP IPADDR=192.168.1.122 #本机地址 NETMASK=255.255.255.0 #子网掩码 GATEWAY=192.168.1.1 #默认网关
修改/etc/sysconfig/network
# Created by anaconda NETWORKING=yes GATEWAY=192.168.1.1 DNS1=119.29.29.29 DNS2=182.254.116.116
然后重启服务即可
service network restart
一般这样就可以，但是如果有问题
必须要在network-scripts里面的默认的文件里面添加HWADDR
[root@localhost ~]# ip addr 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: eno16777736: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 00:0c:29:a7:a0:8c brd ff:ff:ff:ff:ff:ff inet 192.168.1.104/24 brd 192.168.1.255 scope global dynamic eno16777736 valid_lft 7141sec preferred_lft 7141sec inet 192.168.1.122/24 brd 192.168.1.255 scope global secondary eno16777736 valid_lft forever preferred_lft forever inet6 fe80::ac30:2bcb:e910:3ae/64 scope link valid_lft forever preferred_lft forever 3: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN qlen 1000 link/ether 52:54:00:74:cb:1a brd ff:ff:ff:ff:ff:ff inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0 valid_lft forever preferred_lft forever 4: virbr0-nic: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast master virbr0 state DOWN qlen 1000 link/ether 52:54:00:74:cb:1a brd ff:ff:ff:ff:ff:ff
先查看具体的 link/ether
再赋值到eno16777736中
比如：
TYPE="Ethernet" #BOOTPROTO="dhcp" 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" NAME="eno16777736" UUID="157c8fb5-23b3-414c-8519-25bef9b20a54" DEVICE="eno16777736" #ONBOOT="yes" #static assignment NM_CONTROLLED=no #表示该接口将通过该配置文件进行设置，而不是通过网络管理器进行管理 ONBOOT=yes #开机启动 BOOTPROTO=static #静态IP IPADDR=192.168.1.122 #本机地址 NETMASK=255.255.255.0 #子网掩码 GATEWAY=192.168.1.1 #默认网关 HWADDR=00:0c:29:a7:a0:8c
设定开机启动一个名为NetworkManager-wait-online服务，命令为：
systemctl enable NetworkManager-wait-online.service
重启服务。
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错误的经验：
误以为是桥接模式，后来发现是NAT,没有设置虚拟机的 虚拟网络编辑器，坑！
修改成：
TYPE="Ethernet" BOOTPROTO="static" NM_CONTROLLED=no #表示该接口将通过该配置文件进行设置，而不是通过网络管理器进行管理 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" NAME="eno16777736" UUID="157c8fb5-23b3-414c-8519-25bef9b20a54" DEVICE="eno16777736" ONBOOT="yes" #系统将在启动时开启该接口。 IPADDR=192.168.1.122 #静态IP GATEWAY=192.168.1.1 #默认网关 NETMASK=255.255.255.0 #子网掩码 #DNS1=192.168.7.1 #DNS 配置
重启网络服务：
service network restart
重启网络服务以后ok，但是重启系统以后还是变成了动态的，
[root@localhost ~]# ip addr 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: eno16777736: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 00:0c:29:a7:a0:8c brd ff:ff:ff:ff:ff:ff inet 192.168.1.104/24 brd 192.168.1.255 scope global dynamic eno16777736 valid_lft 6995sec preferred_lft 6995sec inet 192.168.1.122/24 brd 192.168.1.255 scope global secondary eno16777736 valid_lft forever preferred_lft forever inet6 fe80::9283:cd42:a281:7a9b/64 scope link valid_lft forever preferred_lft forever 3: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN qlen 1000 link/ether 52:54:00:74:cb:1a brd ff:ff:ff:ff:ff:ff inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0 valid_lft forever preferred_lft forever 4: virbr0-nic: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast master virbr0 state DOWN qlen 1000 link/ether 52:54:00:74:cb:1a brd ff:ff:ff:ff:ff:ff [root@localhost ~]# systemctl disable NetworkManager.service Removed symlink /etc/systemd/system/multi-user.target.wants/NetworkManager.service. Removed symlink /etc/systemd/system/dbus-org.freedesktop.NetworkManager.service. Removed symlink /etc/systemd/system/dbus-org.freedesktop.nm-dispatcher.service. [root@localhost ~]# chkconfig network on [root@localhost ~]# systemctl stop NetworkManager [root@localhost ~]# systemctl restart network
可以从上面看出两个ip
192.168.1.104
192.168.1.122
解决方法：
systemctl disable NetworkManager.service
chkconfig network on
systemctl stop NetworkManager
systemctl restart network
如果还出现
[hongdada@localhost ~]$ systemctl status network.service ● network.service - LSB: Bring up/down networking Loaded: loaded (/etc/rc.d/init.d/network; bad; vendor preset: disabled) Active: failed (Result: exit-code) since 日 2017-12-03 23:05:01 CST; 2min 45s ago Docs: man:systemd-sysv-generator(8) Process: 3957 ExecStart=/etc/rc.d/init.d/network start (code=exited, status=1/FAILURE) 12月 03 23:05:01 localhost.localdomain network[3957]: RTNETLINK answers: File exists 12月 03 23:05:01 localhost.localdomain network[3957]: RTNETLINK answers: File exists 12月 03 23:05:01 localhost.localdomain network[3957]: RTNETLINK answers: File exists 12月 03 23:05:01 localhost.localdomain network[3957]: RTNETLINK answers: File exists 12月 03 23:05:01 localhost.localdomain network[3957]: RTNETLINK answers: File exists 12月 03 23:05:01 localhost.localdomain network[3957]: RTNETLINK answers: File exists 12月 03 23:05:01 localhost.localdomain systemd[1]: network.service: control process exited, code=exited status=1 12月 03 23:05:01 localhost.localdomain systemd[1]: Failed to start LSB: Bring up/down networking. 12月 03 23:05:01 localhost.localdomain systemd[1]: Unit network.service entered failed state. 12月 03 23:05:01 localhost.localdomain systemd[1]: network.service fail
那么。。。
查看https://blog.csdn.net/kokuma/article/details/72876106
可以使用journel -xe查看日志，一般就是修改配置文件里面的Name,DEVICE 为ens33
首先使用ip addr查看网卡，然后查看ifconfig
一般如果是第一次的，就是不是克隆的话，网卡名称为eno16777736,这里只要设定静态ip即可，如果是克隆的话，ip addr里面会发现网卡名称变成了ens33,这样的话，我们也必须在/etc/sysconfig/network-scripts/eno167777736文件里面把NAME,DEVICE里面的改成ens33，重新设定静态IP，重启即可。
http://www.cnblogs.com/Leo_wl/p/5484136.html