=== Setting Permissions ===
<sxh bash>
setfacl -R -m u:username:rwx: /directory/
</sxh>
\\
=== Removing Permissions ===
<sxh bash>
setfacl -x u:username /directory
</sxh>
=== Removing All Acls ===
<sxh bash>
setfacl -b directory/
</sxh>