There are two machines: A and B. OS is SLES 9.4. A is the NFS server, B is the NFS client. A has exported an FS to B. B mounted the NFS share. On both machines I have root permission. There is an XY user on the NFS client: B. The mounted NFS looks like this on B: SERVER:/foo # ls -la /foo/total 28drwxr-xr-x   4 bar  admin  4096 Dec 18 07:35 .drwxr-xr-x  34 root root   4096 Dec 17 10:20 ..drwxrwxr-x   7 bar  admin  4096 Dec 15 03:03 zzzdrwx------   2 root root  16384 Dec  2  2013 lost+foundSERVER:/foo # The bar user isn't XY user and I can't add it to the admin group. My question: How can I give the XY user full write permission to the /foo/ on the NFS client, B? with ACL's? How?UPDATE: I just found out ACL's doesn't work via NFS :DUPDATE#2: no, modifying the permissions on the /foo isn't good, because the /foo is used on A. 
How to give permissions to user (regarding an NFS share)
nfs;acl;sles