CentOS 7.6 batch add, modify and delete virtual network cards operation introduction

modprobe tun
lsmod | grep tun 

vim /etc/yum.repos.d/nux-misc.repo

[nux-misc]
name=Nux Misc
baseurl=http://li.nux.ro/download/nux/misc/el7/x86_64/
enabled=0
gpgcheck=1
gpgkey=http://li.nux.ro/download/nux/RPM-GPG-KEY-nux.ro 

tunctl -t tap0 -u root                     
ifconfig tap0 172.168.1.1 netmask 255.255.255.0 promisc
ip tuntap add tap1 mode tap
ifconfig tap1 10.0.0.1/16
ip tuntap add tap2 mode tap
ifconfig tap2 10.0.0.1/17
ip tuntap add tap3 mode tap
ifconfig tap3 10.0.0.1/18
ip tuntap add tap4 mode tap
ifconfig tap4 10.0.0.1/19
ip tuntap add tap5 mode tap
ifconfig tap5 10.0.0.1/20
ip tuntap add tap6 mode tap
ifconfig tap6 10.0.0.1/21
ip tuntap add tap7 mode tap
ifconfig tap7 10.0.0.1/22
ip tuntap add tap8 mode tap
ifconfig tap8 10.0.0.1/23
ip tuntap add tap9 mode tap
ifconfig tap9 10.0.0.1/24

  #!/bin/bash
  #
  # config_tap Start up the tun/tap virtual nic
  #
  # chkconfig: 2345 55 25
  USER="root"
  TAP_NETWORK="192.168.130.10"
  TAP_DEV_NUM=0
  DESC="TAP config"
  do_start() {
    if [ ! -x /usr/sbin/tunctl ]; then
      echo "/usr/sbin/tunctl was NOT found!"
      exit 1
    fi
    tunctl -t tap$TAP_DEV_NUM -u root
    ifconfig tap$TAP_DEV_NUM ${TAP_NETWORK} netmask 255.255.255.0 promisc
    ifconfig tap$TAP_DEV_NUM
  }
  do_stop() {
    ifconfig tap$TAP_DEV_NUM down 
  }
  do_restart() {
    do_stop
    do_start
  }
  check_status() {
    ifconfig tap$TAP_DEV_NUM 
  }
  case $1 in 
    start) do_start;;
    stop) do_stop;;
    restart) do_restart;;
    status)
              echo "Status of $DESC: "
              check_status
              exit "$?"
              ;;
    *)
      echo "Usage: $0 {start|stop|restart|status}"
      exit 1 
  esac
n=0
while [ $n -le 8 ];do
n=$(( $n + 1 ))
ip tuntap add tap$n mode tap
done
echo $i 
ifconfig tap0 192.168.1.110 netmask 255.255.255.0 promisc 
ifconfig tap1 192.168.1.111 netmask 255.255.255.0 promisc 
ifconfig tap2 192.168.1.112 netmask 255.255.255.0 promisc 
ifconfig tap3 192.168.1.113 netmask 255.255.255.0 promisc 
ifconfig tap4 192.168.1.114 netmask 255.255.255.0 promisc 
ifconfig tap5 192.168.1.115 netmask 255.255.255.0 promisc 
ifconfig tap6 192.168.1.116 netmask 255.255.255.0 promisc 
ifconfig tap7 192.168.1.117 netmask 255.255.255.0 promisc 
ifconfig tap8 192.168.1.118 netmask 255.255.255.0 promisc 
ifconfig tap9 192.168.1.119 netmask 255.255.255.0 promisc

chkconfig --add config_tap 
chkconfig --level 345 config_tap on
service config_tap start