Learn file path relative and absolutly

In past years , i often puzzled in the question of path , but now , i will solve it 

the easy question , it still exeit because i havn't do 

as example： just so so 

i show it by html code , use copy file order to solver it 

The first case:

 you have copyed file to current list execute order

cp file name newFileName 

The second case:

you have copyed test from img to pathDemo , so the current list is img , and ../ is img parent’list pathDemo

Now are you understand ? is it so easy?

Last we use other demo to explain it :

result :

As you see , the imgPath is correct , the Mallhome.html in base Path =>案例详情界面 so ../ is 小庄界面布局 

if you want to use relative path : you can write mallhome.png directly 
and the absolute path is /home/ly..
the wrong is 小庄界面布局/   it isn't be relative path !

error:

right:

../ is filename list ‘parent you should remember filename as filename list where it in