Might not be approved, but this is the classic 755 on all directories, 644 on all files in a tree a la: https://stackoverflow.com/questions/18817744/change-all-files-and-folders-permissions-of-a-directory-to-644-755
As I just discovered `tldr`, I had to try my hand at changing a command
- Give [o]thers (not in the file owner's group) the same rights as the group:
`chmod o=g {{file}}`
+
+- Change permissions [-R]ecursively giving the [u]ser [r]ead, [w]rite, and e[X]ecute rights, and give [g]roup and [o]thers [r]ead and e[X]ecute rights but not [-w]rite rights:
Matthew Thompson