Can't Download PDF in Linux For Beginners Course

Dear Sir,
Linux for Beginners course in The Linux Directory Structure lecture pdf can’t download. It’s Download link is not appear. Please can you fix it and please check other downloads.

Regards,
@Sithum

I have told this to Nathan. Meanwhile, this is the website that pdf is taken from https://www.linuxtrainingacademy.com/linux-directory-structure-and-file-system-hierarchy/