ownership and permissions:
<screen>
&rootprompt; mkdir -p /data/{ftmfiles,officefiles/{letters,invitations,misc}}
-&rootprompt; chown -R abmas.office /data
+&rootprompt; chown -R abmas:office /data
&rootprompt; chmod -R ug+rwxs,o-w,o+rx /data
</screen>
These demonstrate compound operations. The <command>mkdir</command> command