restrict directory listing linux

Question

I want to restrict access to certain directories to my ssh users but allow them to read files by known path from there(mostly it's meant to be done by applications). How is that possible? Are there easy ways? Thank you.

Answer 1

Shouldn't be enough to chmod -r /certain/directories?

Answer 2

Directories have to have +x permissions in order of someone to read files from within via exact path.