How to set default file permissions for all folders/files in a directory?

I found it: Applying default permissions

From the article:

1. Set the setgid bit, so that files/folder under <directory> will be created with the same group as <directory>

   chmod g+s <directory>
   

2. Set the default ACLs for the group and other

   setfacl -d -m g::rwx /<directory>
   setfacl -d -m o::rx /<directory>
   

Next we can verify:

getfacl /<directory>

Output:

# file: ../<directory>/
# owner: <user>
# group: media
# flags: -s-
user::rwx
group::rwx
other::r-x
default:user::rwx
default:group::rwx
default:other::r-x