xattr: add page (#895)

pages/osx/xattr.md

@@ -0,0 +1,23 @@
+# xattr
+
+> Utility for use with extended filesystem attributes.
+
+- List key:value extended attributes for a given file:
+
+`xattr -l {{file}}`
+
+- Write an attribute for a given file:
+
+`xattr -w {{attribute_key}} {{attribute_value}} {{file}}`
+
+- Delete an attribute from a given file:
+
+`xattr -d {{attribute_key}} {{file}}`
+
+- Delete all extended attributes from a given file:
+
+`xattr -c {{file}}`
+
+- Recursively delete an attribute in a given directory:
+
+`xattr -rd {{attribute_key}} {{directory}}`