top: 'include' filter delimiter is missing

Question

I'm trying to filter top's output by command, but when I type O, then

COMMAND?apache2

I get the following error:

'include' filter delimiter is missing

I've looked at the top man page, but can't seem to work out what's going on.

Answer 1

Your filter should be COMMAND=apache. For more information refer to section 5e of the top man page, particularly the bit about 'Input Requirements'.