This is going to be stupid simple but I can't for the life of me figure this out. I ultimately am going to be backing up some files but first am using 7zip to put them in an archive. Whenever I run the following:

it gives me a folder for "backup_04" and then a folder inside that with the next part of the date and so on.

I've tried putting it in quotes (both single and double), back-tics, and parentheses. It either does what I said before or it gives the literal string for the date.


**Update**

So I don't think 7zip liked the format for the date. I ended up using this instead and it seems to work:

From date man pages.
Slashes are not valid file name characters. You need to use - or _ or nothing. I prefer for sorting purposes to use date first of the format YYYYMMDD_backup but choose what is best for you. See the date man page for additional information.

I see you solved the problem but not the reason. It is a filesystem limitation and not due to 7zip.

Thank you!