wget with command in GNU/LINUX

 -r recursively 

 -nH (--no-host-directories) cuts out hostname

--cut-dirs=X (cuts out X directories)

--reject 

--accept

@javad:~$ wget -m --reject .html,css.js,png,gif,txt 'http://www.example.com'

@javad:~$ wget -m --reject .html,css,js,png.7z,pdf --accept .txt 'http://www.example.com'

@javad:~$ wget -r -np  --reject .html,css,js,png.7z,pdf --accept .txt 'http://www.example.com'