RHEL7默认网卡不能使用，配置和修改方法

453423

方法一：
RHEL7开启网卡：将/etc/sysconfig/network-scripts/ifcfg-eno*里的ONBOOT=no改为yes，然后重启网卡
方法二：
改grub文件里面的配置，重启生效。下面是自动修改脚本
#!/bin/bash
#判断有几块网卡并定义环境变量
physicaldevice=(`nmcli device|grep eno|awk '{print $1}'|paste -s`)
i=0
#判断网络连接的设备
inactive="nmcli connection|grep eno|awk '{print $1}'"
#下面的for循环和if判断是为了删除所有的网络连接
for i in `seq 0 ${#physicaldevice[@]}`
do
     if [[ -n "$inactive" ]]; then
         break
     elif [[ "${physicaldevice[@]}" = 0 ]]; then
         break
     else
       nmcli connection delete ${physicaldevice[$i]}
         let i+=1
      fi
      break
done
#修改/etc/default/grub文件配置
sed -i '/^GRUB_CMDLINE_LINUX/c GRUB_CMDLINE_LINUX="vconsole.keymap=us crashkernel=auto net.ifnames=0 biosdevname=0 vconsole.cont=latarcyrheb-sun16 rhgb quiet vga=0x340"' /etc/default/grub
echo  "#the script is runing,system whell be reboot#"
tim=1
for tim in `seq 1 8`
do
    sleep 1
    echo -n ">>>>>>>>>>"
    let tim+=1
done
#修复grub
grub2-mkconfig -o /boot/grub2/grub.cfg &> /dev/null
echo "configuation was ok!would you want to reboot?please insert yes or no!"
read yn
if [[ $yn = yes ]]; then
  reboot
elif
  [[ $yn = no ]];then
break
else
  echo "inputing is error!"
fi