macOS: Is /etc/fstab file deprecated? What is the recommended config file then? I am running macOS High Sierra 10.13.6. When I look for /etc/fstab file, I found /etc/fstab.hd file (no /etc/fstab file was present), and the file content says IGNORE THIS FILE. 

But when I google, there are many articles still talking about /etc/fstab such as this link. So should I create and use /etc/fstab file? If it's not recommended, what is the recommended config file then?
afaik, fstab doesn't exist by default. You have to create one, first time.

From your linked instructions...


  7) Edit (or create) an fstab file by typing the following and pressing enter:
       sudo vifs


Will do precisely that, edit - or create - an fstab file.
Once you've got it set up, it ought to work as expected. I have mine set with ACLs so it will let me edit it without jumping through hoops every time. iirc, by default it's set to root/wheel.

fstab.hd seems to be a red herring, but no amount of Googling has turned up what it is or was used for :/