I tried doing as written in the blog, but when i type this command
sudo vim /etc/php/7.0/apache2/php.ini
as in pt.5..it just opens a blank page..i see in the video there are things that should be written here which i have to edit.
But i just get a new file/page which is blank.Unlike the video where they are running ubuntu on a mac,i am running kali on ubuntu through virtual box

Also you are right about that...i have windows10 and ubuntu dual booted in my laptop..i wanted to learn about hacking and stuff so i started learning from youtube videos and did as was said.They showed to do things from kali in virtual box from a base linux distro..thus i started using kali in virtualbox in ubuntu.I was proceeding all right but just got stuck in dvwa..usually other problems i had before i could figure out a way in a day or two.This problem is like unsolvable..already have spend like a week and still stuck here

Apparently there is no php.ini file in that location.
You could use the commands find or locate to find the php.ini in your distro. Or try:

IMO you should be more experienced before learning "hacking and stuff". And you're not going to learn things from videos, if you don't put your hands into it

It points to
/etc/php/7.0/cli/php.ini
Ok i will try with this one


[QUOTE=IMO you should be more experienced before learning "hacking and stuff". And you're not going to learn things from videos, if you don't put your hands into it[/QUOTE]

I didn't have any idea how to start that's why thought maybe i could learn something from videos.Do you suggest i get my basics on networking/programming clear and maybe after that start these things?But even then i may not know how to start.If you could help in that aspect that would be great..like telling me how to start..and like what topics

So if you want to be a hacker, you should have thought of a command like the one above, to find the location of php.ini.


Of course you can learn from videos, my objection is that you need more expertise in Linux before trying "hacking and stuff".
You need to understand the error(s), examine log files and use the search engines trying to solve the problem. And of course come here at LQ posting your problem along with the logs and giving details like distro, version, faulty program, etc.

Sir,I figured out another way and now i am able to use dvwa.I downloaded lab26 from vulnhub.com and set that up in up virtualbox..using its ipaddress i can now access dvwa,bWapp and few other things from my ubuntu.Saw it here https://youtu.be/uNJ6SYMzEOk
Can you tell if this is safe or not?..i mean i am using the userid and password from the website.

And sir as you said i will surely work on my linux knowledge

Glad to see you've sorted it out.
I didn't watch the video, so I don't know what you mean by if it's safe? You can always change at least the password before starting using it for your tests.

Regards

Ok sir...thanks for your help