whatis and apropos don't work

["Yunus" <yunus@xxxxxxxxx>]

Dear All,

 

I'm using FC3. I tried to issue these commands  below at terminal window:

      [yunus@localhost ] whatis ls     

      bash: ls nothing apropriate              <<== i always get this message

                       and

      [yunus@localhost ] apropos browser

      bash: browser nothing apropriate    <<== i always get this message

 

Could anyone help me with this problem?

 

Thanks in advance!

 

Regards,

 

yunus