this is obsolete doc -- see http://doc.nethence.com/ instead

ACL usage 

Grand recursive rights to "user1", 

setfacl -R -m u:user1:rwx /path/to/folder

and make sure "user1" will always has those rights, 

setfacl -d -R -m u:user1:rwx /path/to/folder

Delete all ACLs recursively, 

setfacl -b /path/to/folder