Tabs, groups and commands in a ribbon

[salmonella]

I can show/hide the access default ribbon tabs and groups, but is there
a way to, for example, hide a command in a Tab's group?

For example, are we allowed to hide the 'linked table manager' command in
the 'Database Tools' group? If so, can someone give me a line of xml so I can
see how to do it.


thanks