Network shell

vim ipddeadd.sh

Example of multi branch network program , You can choose the script to execute , Back to main menu , And exit command

#!/bin/bash
echo -e " Please select the option to use :\n For network configuration, please press 1\n For others, please press 2\n Please enter \n Press... To exit ：\c "
read num
case $num in
1)
read -p " Please enter the name of the network card ：ifcfg-" nname
read -p " Use DHCP Please enter 1, Use STATIC Please enter 2 : " DHCP           # From the back if Sentence judgment 1 and 2 Result 
read -p " Please enter the IP Address ： " IP
read -p " Please enter your gateway ： " GATEWAY
read -p " Please enter the DNS Address ： " DNS
read -p " Please enter your subnet mask ： " NETMASK
npath="/etc/sysconfig/network-scripts/ifcfg-$nname"        # Define network card path variables 
function echo_network_file(){                              # Use function and function name 
        echo "TYPE=Ethernet" > $npath
        echo "BOOTPROTO="$A"" >> $npath                    # from if Statement judgment result definition A The content of 
        echo "DEFROUTE="no"" >> $npath
        echo "PEERDNS="yes"" >> $npath
        echo "PEERROUTES="yes"" >> $npath
        echo "IPV4_FAILURE_FATAL="no"" >> $npath
        echo "IPV6INIT="yes"" >> $npath
        echo "IPV6_AUTOCONF="no"" >> $npath
        echo "IPV6_DEFROUTE="no"" >> $npath
        echo "IPV6_PEERDNS="no"" >> $npath
        echo "IPV6_PEERROUTES="no"" >> $npath
        echo "IPV6_FAILURE_FATAL="no"" >> $npath
        echo "NAME="$nname"" >> $npath                     # Fill in by the entered network card name 
        echo "UUID=$(cat /sys/class/dmi/id/product_uuid)" >> $npath           # extract uuid Fill in the contents of the document 
        echo "DEVICE="$nname"" >> $npath                   # Fill in by the entered network card name 
        echo "ONBOOT="yes"" >> $npath
        echo "IPADDR="$IP"" >> $npath                      # write in IP Address 
        echo "GATEWAY="$GATEWAY"" >> $npath                # Write the gateway address 
        echo "NETMASK="$NETMASK"" >> $npath                # Write subnet mask 
        echo "DNS="$DNS"" >> $npath                        # write in DNS Address 
}
   if [ "$DHCP"  = 1 ];then                                #if Statement judgment equals 1 Then use DHCP, Others use static ip
                  A="dhcp"
            else
                  A="static"
            fi

echo_network_file                                          # End of function 

echo "nameserver "$DNS"" >>/etc/resolv.conf                # hold DNS Write data to the domain name resolution configuration 

systemctl restart network                                  # Restart NIC 

echo " Set up the success "
;;
2)
echo "000"
./case.sh
;;
3)
exit
;;
esac

chmod +x ipaddradd.sh

Using examples ：

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