Creating a post on Octopress uses a rake command like so:rake new_post["My New Post"]
However when you try to create a new post within zsh shell it doesn't work.
$ rake new_post["My New Post"]
zsh: no matches found: new_post[My New Post]
After following worked for me after doing some googling.
Solution
You can fix this problem by simply running rake new_post
rake new_post
Enter a title for your post:
This will then prompt for title of post and then create it. Done!