Liu Ming wrote:
> Hi All,
>
> My OS is Fedora. I download Ruby source and comppiled. I download
> ActiveTcl and installed. But, when I do require 'tk', ruby say:
> LoadError:no such file to load -- tk.
>
> Please help me.
>
> Thanks.
>   

It seems you may have installed Ruby then Tcl, so you may need to 
recompile Ruby to use it.
Try the information here: http://www.tkdocs.com/tutorial/install.html

-Justin