how to get all the pdf files of a website recursive ?
 

how to get all the pdf files of a website recursive ?

Do you mean the html files? (eg my site has no pdf files)

Have you looked at wget?

yes yes
and wget cannot get all the pdf files,

wget -r -l15 -A.pdf http://www.rasmusen.org/

and when I do :
wget -r -nd --convert-links -l15 -A.pdf http://www.rasmusen.org/
it does not convert any single link

Have a look at httrack [1]. It is a website copier and you can specify which files to include respectively exclude.

[1] http://www.httrack.com/