Either in a terminal, or in a google search field type "man <appname>"
Example "man mysql"

Some apps don't have a man page but many do.

robbin wrote:

Hi,

Is there a cmd to display the configure options when installing this software?

I saw it before, but can't remember it now, anyone knows ?

Thanks in advance

When you you compiling the new software you can issue the command "./configure --help" to review all of the options.

If you are wanting to view the configure flags for pre-compiled packages it will be more difficult because not all applications use autotools and because each distro using a different method to build their packages. If you are looking for the flags on pre-build packages then we will need to know which distro you are using so we can refer you to a site or file to locate that information.