c++ Program to validate an IPV4 address

c++ Program to validate an IPV4 address

ifconfig command not working in Ubuntu

 The "ifconfig" command is used to get network related details of the Ubuntu/Linux based machines. This is a package which comes with the system default but sometimes it does not works.

If you are getting below error:

 

It means the package is missing.

So it need to install. To install it run the below command:

sudo apt install net-tools

With sudo it may ask you for the password. So enter the password. In this snapshot it does not asked for the password as I have already executed some sudo command within a minute. If you executed sudo command continuously it does not ask for the password in short span of time. But if you run the command after 5 minutes then it will the password again.

After that when you run the ifconfig command then it will show the network details as below: