Danbooru script

I`m not a programmer but whatever I need a script or anything that will download images with specific tags from danbooru like http://danbooru.donmai.us/ or http://gelbooru.com/

I tried to run this one - http://pastebin.org/40166 on cydweg and linux but it always give me this:

~$ sh ./db pass login tag
./db: 19: Syntax error: word unexpected (expecting "do")

Am I doing it wrong? Maybe someone knows something better?

>>8
Yes, your failure to copy+paste correctly is indeed shiichan's fault.