OS + CentOS 7 network

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CentOS 7.6.1810 5口网卡+WIFI启动

问题1：如何shell启动网卡命令

方法1：

[root@centos7 ~]# systemctl enable NetworkManager

下一步，插上网线2根，root进入桌面启动2口有线网络，自动获取 ，同时勾选Connection Automatically 即可。

方法2：

[root@centos7 ~]# systemctl disable NetworkManager

[root@centos7 ~]# ls /etc/sysconfig/network-scripts/
ifcfg-eno1 ifcfg-enp1s0f3 ifdown-eth ifdown-isdn ifdown-sit ifup ifup-ib ifup-plip ifup-routes ifup-tunnel network-functions-ipv6
ifcfg-enp1s0f0 ifcfg-lo ifdown-ib ifdown-post ifdown-Team ifup-aliases ifup-ippp ifup-plusb ifup-sit ifup-wireless
ifcfg-enp1s0f1 ifdown ifdown-ippp ifdown-ppp ifdown-TeamPort ifup-bnep ifup-ipv6 ifup-post ifup-Team init.ipv6-global
ifcfg-enp1s0f2 ifdown-bnep ifdown-ipv6 ifdown-routes ifdown-tunnel ifup-eth ifup-isdn ifup-ppp ifup-TeamPort network-functions

只要插满网线，修改如/etc/sysconfig/network-scripts/ifcfg-eno1里的ONBOOT=yes。

//ONBOOT是指明在系统启动时是否激活网卡，只有在激活状态的网卡才能去连接网络，进行网络通讯

//ONBOOT=yes 等同于，桌面版 勾选Connection Automatically

[root@centos7 ~]# vim /etc/sysconfig/network-scripts/ifcfg-eno1

TYPE=Ethernet
PROXY_METHOD=none
BROWSER_ONLY=no
BOOTPROTO=dhcp
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_FAILURE_FATAL=no
IPV6_ADDR_GEN_MODE=stable-privacy
NAME=eno1
UUID=7ae3c8f7-f46b-4947-86b4-5b5657987e76
DEVICE=eno1
ONBOOT=yes

下一步网卡，一个个操作启动

[root@centos7 ~]#  /usr/sbin/ifup ifcfg-eno1

[root@centos7 ~]#  /usr/sbin/ifup ifcfg-enp1s0f0

[root@centos7 ~]#  /usr/sbin/ifup ifcfg-enp1s0f1

[root@centos7 ~]#  /usr/sbin/ifup ifcfg-enp1s0f2

[root@centos7 ~]#  /usr/sbin/ifup ifcfg-enp1s0f3

、、、

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