s
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
、、、
end