nmtui 工具使用的话，需要开启NetworkManager(网卡文件不存在ens192)

环境采样：

[root@k3master network-scripts]# cat /etc/redhat-release
CentOS Linux release 7.2.1511 (Core)
[root@k3master network-scripts]# uname -r
3.10.0-327.el7.x86_64

查看NetworkManager相关工具包

[root@k2master network-scripts]# nm
nm              nmcli           nm-online       nmtui           nmtui-connect   nmtui-edit      nmtui-hostname  

[root@k2master network-scripts]# nmcli conn
 Error: NetworkManager is not running.

//需要先开启NetworkManager支持.

nmtui使用前提是NetworkManager启动

[root@k3master network-scripts]# nmtui
NetworkManager is not running.  //没有运行NetworkManager

[root@k3master network-scripts]# systemctl start NetworkManager
[root@k3master network-scripts]# nmtui

网卡配置文件列出，使用numtui创建前

[root@k3master network-scripts]# ls
ifdown-eth   ifdown-isdn    ifdown-sit       ifup          ifup-ib    ifup-plip   ifup-routes    ifup-tunnel        network-functions-ipv6
ifcfg-lo      ifdown-ib    ifdown-post    ifdown-Team      ifup-aliases  ifup-ippp  ifup-plusb  ifup-sit       ifup-wireless
ifdown        ifdown-ippp  ifdown-ppp     ifdown-TeamPort  ifup-bnep     ifup-ipv6  ifup-post   ifup-Team      init.ipv6-global
ifdown-bnep   ifdown-ipv6  ifdown-routes  ifdown-tunnel    ifup-eth      ifup-isdn  ifup-ppp    ifup-TeamPort  network-functions

使用nmtui基本都是用tab和空格键操作

[root@k3master network-scripts]# nmtui

直接回车

这里是想要创建ens224的配置文件

继续回车

在回到这个节点，用tab键选中＜quit＞

查看网卡配置文件

[root@k3master network-scripts]# ls
ifcfg-ens192  ifdown-bnep  ifdown-ipv6  ifdown-routes    ifdown-tunnel  ifup-eth   ifup-isdn   ifup-ppp     ifup-TeamPort     network-functions
ifcfg-ens224  ifdown-eth   ifdown-isdn  ifdown-sit       ifup           ifup-ib    ifup-plip   ifup-routes  ifup-tunnel       network-functions-ipv6
ifcfg-lo      ifdown-ib    ifdown-post  ifdown-Team      ifup-aliases   ifup-ippp  ifup-plusb  ifup-sit     ifup-wireless
ifdown        ifdown-ippp  ifdown-ppp   ifdown-TeamPort  ifup-bnep      ifup-ipv6  ifup-post   ifup-Team    init.ipv6-global

查看配置文件

[root@k3master network-scripts]# cat ifcfg-ens192
HWADDR=04:42:B4:01:20:DF　//mac地址出现
TYPE=Ethernet
BOOTPROTO=none
IPADDR=10.129.79.44  //ip
PREFIX=24
GATEWAY=10.129.79.1
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
IPV4_ROUTE_METRIC=100
IPV6INIT=no
NAME=ens192
UUID=bcf813f4-a814-47ee-9032-0a74e689209a  //网卡标识
DEVICE=ens192
ONBOOT=no   

//这里要注意用nmtui配置的，默认重启是no,这样一旦你使用reboot命令则会产生问题，ssh不上的情况，所以需要修改为yes,这样你才能reboot成功．

nmcli con 查看网卡UUID(在出现问题前，这里是错误的)

[root@k3master network-scripts]# nmcli con
NAME     UUID                                  TYPE            DEVICE
ens192   bcf833f4-a814-47ee-9032-0a74e689209a  802-3-ethernet  ens192
tunl0    811a0116-a8tb-4e8c-8559-688cdcb17223  generic         tunl0
ens224   2c804926-2222-4691-b797-dcfb3be5e4d1  802-3-ethernet  ens224
docker0  8e7f51a2-7f7d-45e0-9148-28e3e82448be  bridge          docker0